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Significant Accounting Policies [Text Block]

Note

—

Summary of Significant Accounting Policies

Use of Estimates

The preparation of Consolidated Financial Statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and the accompanying notes. Management evaluates its estimates and related assumptions regularly, including those related to the value of property, plant and equipment, income taxes including valuation allowances for net deferred tax assets, share-based compensation and fair value measurements. Changes in facts and circumstances or additional information

may

result in revised estimates, and actual results

may

differ from these estimates.

Concentrations of Credit Risk

Financial instruments that potentially subject us to a concentration of credit risk consist principally of cash and cash equivalents. We maintain cash balances with a single financial institution, which

may

at times be in excess of federally insured levels. We have

not

incurred losses related to these cash and cash equivalent balances to date.

Cash Equivalents

We consider all highly liquid investments with an original maturity of

three

months or less when purchased to be cash equivalents.

Investment Securities

We define investment securities as investments in marketable securities that can be readily converted to cash. We determine the appropriate classification of investment securities at the time of purchase and reevaluate such classification at each balance sheet date. Investment securities are initially recorded at cost and remeasured to fair value, with changes presented in other income in our Consolidated Statements of Operations.

Property, Plant and Equipment

Generally, we begin to capitalize the costs of our development projects once construction of the individual project is probable. This assessment includes the following criteria:

•

funding for design and permitting has been identified and is expected in the near-term;

•

key vendors for development activities have been identified, and we expect to engage them at commercially reasonable terms;

•

we have committed to commencing development activities;

•

regulatory approval is probable;

•

construction financing is expected to be available at the time of a final investment decision (“FID”);

•

prospective customers have been identified and the FID is probable; and

•

receipt of customary local tax incentives, as needed for project viability, is probable.

Prior to meeting the criteria above, costs associated with a project are expensed as incurred. Expenditures for normal repairs and maintenance are expensed as incurred.

When assets are retired or disposed, the cost and accumulated depreciation are eliminated from the accounts and any gain or loss is reflected in our Consolidated Statements of Operations.

Property, plant and equipment is carried at historical cost and depreciated using the straight-line method over their estimated useful lives.

Leasehold improvements are depreciated over the lesser of the economic life of the leasehold improvement or the term of the lease, without regard to extension/renewal rights.

Management tests property, plant and equipment for impairment whenever events or changes in circumstances have indicated that the carrying amount of property, plant and equipment might

not

be recoverable. Assets are grouped at the lowest level for which there are identifiable cash flows that are largely independent of the cash flows of other groups of assets for purposes of assessing recoverability. Recoverability generally is determined by comparing the carrying value of the asset to the expected undiscounted future cash flows of the asset. If the carrying value of the asset is

not

recoverable, the amount of impairment loss is measured as the excess, if any, of the carrying value of the asset over its estimated fair value.

Warrants

The Company determines the accounting classification of warrants that are issued, as either liability or equity, by

first

assessing whether the warrants meet liability classification in accordance with Accounting Standards Codification (“ASC”)

480

Distinguishing Liabilities from Equity

(“ASC

480”

), and then in accordance with ASC

815

40,

Accounting for Derivative Financial Instruments Indexed to, and Potentially Settled in, a Company’s Own Stock

(“ASC

815

40”

). Under ASC

480,

warrants are considered liability classified if the warrants are mandatorily redeemable, obligate the issuer to settle the warrants or the underlying shares by paying cash or other assets, or warrants that must or

may

require settlement by issuing a variable number of shares.

If warrants do

not

meet liability classification under ASC

480,

the Company assesses the requirements under ASC

815

40,

which states that contracts that require or

may

require the issuer to settle the contract for cash or a variable number of shares are liabilities recorded at fair value, irrespective of the likelihood of the transaction occurring that triggers the net cash settlement feature. If the warrants do

not

require liability classification under ASC

815

40,

in order to conclude equity classification, the Company assesses whether the warrants are indexed to our common stock and whether the warrants are classified as equity under ASC

815

or other applicable GAAP. After all relevant assessments are made, the Company concludes whether the warrants are classified as liability or equity. Liability classified warrants are required to be accounted for at fair value both on the date of issuance and on subsequent accounting period ending dates, with all changes in fair value after the issuance date recorded in the statements of operations as a gain or loss. Equity classified warrants are accounted for at fair value on the issuance date with

changes in fair value recognized after the issuance date.

Fair Value of Financial Instruments

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Hierarchy Levels

and

are terms for the priority of inputs to valuation techniques used to measure fair value. Hierarchy Level

inputs are quoted prices in active markets for identical assets or liabilities. Hierarchy Level

inputs are inputs other than quoted prices included within Level

that are directly or indirectly observable for the asset or liability. Hierarchy Level

inputs are inputs that are

not

observable in the market. In determining fair value, we use observable market data when available, or models that incorporate observable market data. In addition to market information, we incorporate transaction-specific details that, in management’s judgment, market participants would take into account in measuring fair value. We maximize the use of observable inputs and minimize our use of unobservable inputs in arriving at fair value estimates. Recurring fair-value measurements are performed for investment securities as disclosed in

Note

–

Investment Securities

and for Common Stock Warrant liabilities as disclosed in

Note

–

Preferred Stock and Common Stock Warrants

. The carrying amount of cash and cash equivalents and accounts payable reported on the Consolidated Balance Sheets approximates fair value due to their short-term maturities.

Treasury Stock

Treasury stock is recorded at cost. Issuance of treasury stock is accounted for on a weighted average cost basis. Differences between the cost of treasury stock and the re-issuance proceeds are charged to additional paid-in capital.

Net Loss Per Share

Net loss per share (“EPS”) is computed in accordance with GAAP. Basic EPS excludes dilution and is computed by dividing net income (loss) by the weighted average number of common shares outstanding during the period. Diluted EPS reflects potential dilution and is computed by dividing net income (loss) by the weighted average number of common shares outstanding during the period increased by the number of additional common shares that would have been outstanding if the potential common shares had been issued and were dilutive. The dilutive effect of unvested stock and warrants is calculated using the treasury-stock method and the dilutive effect of convertible securities is calculated using the if-converted method. Basic and diluted EPS for all periods presented are the same since the effect of our potentially dilutive securities are anti-dilutive to our net loss per share, as disclosed in

Note

–

Net Loss Per Share Attributable to Common Stockholders

Share-based Compensation

We recognize share-based compensation at fair value on the date of grant. The fair value is recognized as expense (net of any capitalization) over the requisite service period. For equity-classified share-based compensation awards, compensation cost is recognized based on the grant-date fair value using the quoted market price of our common stock and

not

subsequently remeasured. The fair value is recognized as expense, net of any capitalization, using the straight-line basis for awards that vest based on service conditions and using the graded-vesting attribution method for awards that vest based on performance conditions. We estimate the service periods for performance awards utilizing a probability assessment based on when we expect to achieve the performance conditions. For liability classified share-based compensation awards, compensation cost is initially recognized on the grant date using estimated payout levels. Compensation cost is subsequently adjusted quarterly to reflect the updated estimated payout levels based on the changes in our stock price. We account for forfeitures as they occur.

Income Taxes

Provisions for income taxes are based on taxes payable or refundable for the current year and deferred taxes on temporary differences between the tax basis of assets and liabilities and their reported amounts in the Consolidated Financial Statements. Deferred tax assets and liabilities are included in the Consolidated Financial Statements at currently enacted income tax rates applicable to the period in which the deferred tax assets and liabilities are expected to be realized or settled. As changes in tax laws or rates are enacted, deferred tax assets and liabilities are adjusted through the current period’s provision for income taxes. A valuation allowance is recorded to reduce the carrying value of our net deferred tax assets when it is more likely than

not

that a portion or all of the deferred tax assets will expire before realization of the benefit or future deductibility is

not

probable. We recognize the tax benefit from an uncertain tax position only if it is more likely than

not

that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the tax position.

Emerging Growth Company and Smaller Reporting Company

The Company is an “emerging growth company,” as defined in Section

(a) of the Securities Act of

1933,

as amended (the “Securities Act”), as modified by the Jumpstart Our Business Startups Act of

2012

(the “JOBS Act”). An “emerging growth company”

may

take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are

not

emerging growth companies including, but

not

limited to,

not

being required to comply with the auditor attestation requirements of Section

404

of the Sarbanes-Oxley Act of

2002,

reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments

not

previously approved. We

may

take advantage of these reporting exemptions until we are

longer an emerging growth company.

Further, section

102

(b)(

) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until such time as those standards apply to private companies. The Company has elected to “opt-out” of this exemption and, therefore, will be subject to the same new or revised accounting standards as other public companies that are

not

emerging growth companies.

Additionally, under Rule

12b

of the Securities Exchange Act of

1934,

as amended (the “Exchange Act”), the Company qualifies as a “smaller reporting company” because the value of its common stock held by non-affiliates as of the end of its most recently completed

second

fiscal quarter was less than

$250

million. For as long as the Company remains a smaller reporting company, it

may

take advantage of certain exemptions from the SEC’s reporting requirements that are otherwise applicable to public companies that are

not

smaller reporting companies.

Note 9 - Preferred Stock and Common Stock Warrants - Fair Value Assumptions (Details)	Dec. 31, 2019	Dec. 31, 2018
Measurement Input, Share Price [Member]
Warrant measurement input	6.14	5.4
Measurement Input, Exercise Price [Member]
Warrant measurement input	0.01	0.01
Measurement Input, Risk Free Interest Rate [Member]
Warrant measurement input	0.016	0.025
Measurement Input, Price Volatility [Member]
Warrant measurement input	0.276	0.331
Measurement Input, Expected Term [Member]
Warrant measurement input	1.8	2.7

Note 9 - Preferred Stock and Common Stock Warrants

12 Months Ended

Dec. 31, 2019

Stockholders' Equity Note Disclosure [Text Block]

Note

— Preferred Stock and Common Stock Warrants

Preferred Stock

August 2018,

we sold an aggregate of

50,000

shares of Series A Convertible Preferred Stock, par value

$0.0001

per share (the “Series A Preferred Stock), at

$1,000

per share for an aggregate purchase price of

$50

million and we issued an additional

1,000

shares of Series A Preferred Stock in aggregate as origination fees to (i) York Capital Management Global Advisors, LLC, severally on behalf of certain funds or accounts managed by it or its affiliates (“York”), (ii) Valinor Management, L.P., severally on behalf of certain funds or accounts for which it is investment manager (“Valinor”), (iii) Bardin Hill Investment Partners LP (formerly known as Halcyon Capital Management LP), severally on behalf of certain funds or accounts managed by it or its affiliates (“Bardin Hill,” and together with York and Valinor, the “Fund Purchasers”) and (iv) HGC NEXT INV LLC (“HGC” and, together with the Fund Purchasers, the “Series A Preferred Stock Purchasers”). Warrants were issued together with the shares of Series A Preferred Stock (the “Series A Warrants”).

In connection with the issuance of Series A Preferred Stock and pursuant to backstop commitment agreements with the Fund Purchasers dated

April 11, 2018,

as subsequently amended on

August 3, 2018 (

as amended, the “Backstop Agreements”), we also issued a total of

413,658

shares of Company common stock as fees to the Fund Purchasers. Each Fund Purchaser is a Company stockholder and, pursuant to that certain Agreement and Plan of Merger, dated as of

April 17, 2017,

by and among the Company, each Fund Purchaser and/or

one

or more of its affiliates, and the other parties named therein,

three

individuals,

two

individuals, and

one

individual from York, Valinor, and Bardin Hill, respectively, were appointed to the Company’s board of directors.

September 2018,

we sold an aggregate of

29,055

shares of Series B Convertible Preferred Stock, par value

$0.0001

per share (the “Series B Preferred Stock” and, together with the Series A Preferred Stock, the “Convertible Preferred Stock”), at

$1,000

per share for an aggregate purchase price of

$29.055

million and we issued an additional

581

shares of Series B Preferred Stock in aggregate as origination fees to certain funds managed by BlackRock (“BlackRock”).

May 2019,

we sold an aggregate of

20,945

shares of Series B Preferred Stock, at

$1,000

per share for an aggregate purchase price of

$20.945

million and we issued an additional

418

shares of Series B Preferred Stock in aggregate as origination fees to York Tactical Energy Fund, L.P. and York Tactical Energy Fund PIV-AN, L.P. (the “York Tactical Funds” and, together with BlackRock, Bardin Hill, Valinor and HGC, the “Series B Preferred Stock Purchasers”), (ii) Bardin Hill, (iii) Valinor and (iv) HGC. Warrants were issued together with the shares of Series B Preferred Stock (the “Series B Warrants” and, together with the Series A Warrants, the “Common Stock Warrants”).

The Company has the option to convert all, but

not

less than all, of the Convertible Preferred Stock into shares of Company common stock at a strike price of

$7.34

per share of Company common stock (the “Conversion Price”) on any date on which the volume weighted average trading price of shares of Company common stock for each trading day during any

of the prior

trading days is equal to or greater than

175%

of the Conversion Price, in each case subject to certain terms and conditions. Furthermore, the Company must convert all of the Convertible Preferred Stock into shares of Company common stock at the Conversion Price on the earlier of (i)

ten

(

) business days following a FID Event (as defined in the certificates of designations of the Convertible Preferred Stock) and (ii) the date that is the

tenth

(

10th

) anniversary of the closings of the issuances of the Convertible Preferred Stock, as applicable.

The shares of Convertible Preferred Stock bear dividends at a rate of

12%

per annum, which are cumulative and accrue daily from the date of issuance on the

$1,000

stated value. Such dividends are payable quarterly and

may

be paid in cash or in-kind. During

2019

, the Company paid-in-kind

$11.2

million of dividends to holders of the Convertible Preferred Stock. On

January 9, 2020,

the Company declared dividends to holders of the Convertible Preferred Stock as of the close of business on

December 15, 2019.

January 15, 2020,

the Company paid-in-kind

$3.4

million of dividends to holders of the Convertible Preferred Stock.

The holders of Convertible Preferred Stock vote on an “as-converted” basis with the holders of the Company common stock on all matters brought before the holders of Company common stock. In addition, the holders of Convertible Preferred Stock have separate class voting rights with respect to certain matters affecting their rights.

The Convertible Preferred Stock do

not

qualify as liability instruments under ASC

480,

because they are

not

mandatorily redeemable. However, as SEC Regulation S-

Rule

does

not

permit a probability assessment for a change of control provision, the Convertible Preferred Stock must be presented as mezzanine equity between liabilities and stockholders’ equity in our Consolidated Balance Sheets because a change of control event, although

not

considered probable, could force the Company to redeem the Convertible Preferred Stock for cash or assets of the Company. At each balance sheet date, we must re-evaluate whether the Convertible Preferred Stock continue to qualify for equity classification.

Common Stock Warrants

The Series A Warrants issued to the Series A Preferred Stock Purchasers represent the right to acquire in the aggregate a number of shares of common stock equal to approximately

basis points (

0.71%

) of all outstanding shares of Company common stock, measured on a fully-diluted basis, on the exercise date with a strike price of

$0.01

per share. The Series B Warrants issued to the Series B Preferred Stock Purchasers represent the right to acquire in the aggregate a number of shares of common stock equal to approximately

basis points (

0.71%

) of all outstanding shares of Company common stock, measured on a fully diluted basis on the exercise date with a strike price of

$0.01

per share.

The Common Stock Warrants have a fixed

three

-year term commencing on the closings of the issuances of the associated Convertible Preferred Stock. The Common Stock Warrants

may

only be exercised by holders of the Common Stock Warrants at the expiration of such

three

-year term, except that the Company can force the exercise of the Common Stock Warrants prior to expiration of such term if the volume weighted average trading price of shares of Common Stock for each trading day during any

of the prior

trading days is equal to or greater than

175%

of the of the applicable Convertible Preferred Stock conversion price and, with respect to the Series B Warrants, the Company simultaneously elects to force a mandatory exercise of all other warrants then outstanding and un-exercised and held by any holder of parity stock. Pursuant to ASC

815

the fair value of the Common Stock Warrants was recorded as a non-current liability on our Consolidated Balance Sheet on the issuance dates. The Company revalues the Common Stock Warrants at each balance sheet date and recognized a loss of

$2.7

million and a gain of

$0.2

million as of

December 31, 2019

and

2018,

respectively. The Common Stock Warrant liabilities are included in Level

of the fair value hierarchy.

The assumptions used in the Monte Carlo simulation to estimate the fair value of the Common Stock Warrants as of

December 31, 2019

are as follows:

	December 31,			December 31,
	2019			2018
Stock price	$	6.14		$	5.40
Exercise price	$	0.01		$	0.01
Risk-free rate		1.6	%		2.5	%
Volatility		27.6	%		33.1	%
Term (years)		1.8			2.7

Initial Fair Value Allocation

Net proceeds in

2019

were allocated on a fair value basis to the Series B Warrants and on a relative fair value basis to the Series B Preferred Stock. The allocation of net cash proceeds from the sale of Series B Preferred Stock in

2019

is as follows (in thousands):

			Year Ended December 31, 2019
					Series B
			Series B		Convertible
			Warrants		Preferred
Gross proceeds	$	20,945
Equity issuance costs		—
Net proceeds - Initial Fair Value Allocation	$	20,945	$	1,936	$	19,009
Per balance sheet upon issuance			$	1,936	$	19,009

Net cash proceeds in

2018

were allocated on a fair value basis to the Series A Warrants and the Series B Warrants and on a relative fair value basis to the Company common stock, the Series A Preferred Stock and the Series B Preferred Stock. As described below,

$2.5

million of the

$41.1

million allocated to the Series A Preferred Stock was allocated to additional paid-in capital to give effect to the intrinsic value of a beneficial conversion feature (“BCF”). The allocation of net cash proceeds from the sale of Series A Preferred Stock and Series B Preferred Stock in

2018

is as follows (in thousands):

				Year Ended December 31, 2018
													Additional Paid-in Capital
								Series A			Series B				Beneficial
				Series A		Series B		Convertible			Convertible		Common		Conversion
				Warrants		Warrants		Preferred			Preferred		Stock		Feature
Gross proceeds	$	79,055
Equity issuance costs		(2,104	)
Net proceeds - Initial Fair Value Allocation	$	76,951		$	4,859	$	2,746	$	41,079		$	26,159	$	2,108	$	—
Allocation to BCF					—		—		(2,530	)		—		—		2,530
Per balance sheet upon issuance				$	4,859	$	2,746	$	38,549		$	26,159	$	2,108	$	2,530

Beneficial Conversion Feature

ASC

470

–

Debt – Debt with conversion and Other Options

(“ASC

470

20”

) defines a BCF as a nondetachable conversion feature that is in the money at the issuance date. The Company was required by ASC

470

to allocate a portion of the proceeds from the Series A Preferred Stock equal to the intrinsic value of the BCF to additional paid-in capital. The intrinsic value of the BCF is calculated at the issuance date as the difference between the “accounting conversion price” and the market price of shares of Company common stock multiplied by the number of shares of Company common stock into which the Series A Preferred Stock is convertible. The accounting conversion prices of

$5.58

per share and

$6.24

per share for the Fund Purchasers and HGC, respectively, is different than the initial conversion price of

$7.50

per share. The “accounting conversion price” is derived by dividing the proceeds allocated to the Series A Preferred Stock by the number of shares of Company common stock into which the Series A Preferred Stock is convertible. We are recording the accretion of the

$2.5

million Series A Preferred Stock discount attributable to the BCF as a deemed dividend using the effective yield method over the period prior to the expected conversion date.

Note 10 - Net Loss Per Share Attributable to Common Stockholders - Anti-dilutive Securities (Details) - shares
shares in Thousands

12 Months Ended

Dec. 31, 2019

Dec. 31, 2018

28,302

16,586

Unvested Stock [Member]

Convertible Preferred Stocks [Member]

^[1]

861

498

Common Stock Warrants [Member]

13,697

3,552

1,662

454

IPO Warrants [Member]

^[2]

12,082

[1]

Does not include 3.6 million shares and 10.8 million shares of unvested stock for the year ended December 31, 2019 and 2018 because the performance conditions had not yet been satisfied as of December 31, 2019 and 2018, respectively.

[2]

The IPO Warrants are exercisable at a price of $11.50 per share and expire July 24, 2022. The Company may redeem the Warrants at a price of $0.01 per IPO Warrant upon 30 days' notice only if the last sale price of our common stock is at least $17.50 per share for any 20 trading days within a 30-trading day period. If the Company redeems the IPO Warrants in this manner, the Company will have the option to do so on a cashless basis with the issuance of an economically equivalent number of shares of Company common stock.

Note 4 - Investment Securities (Tables)

12 Months Ended

Dec. 31, 2019

Debt Securities, Available-for-sale [Table Text Block]

	December 31,				December 31,
	2019				2018
	Fair value		Cost		Fair value		Cost
JPMorgan Managed Income Fund	$	62,207	$	62,178	$	72,453	$	72,567

Note 7 - Other Non-current Assets - Schedule of Other Non-current Assets (Details) - USD ($)
$ in Thousands

Dec. 31, 2019

Dec. 31, 2018

Aug. 31, 268

Permitting costs(1)

^[1]

$ 2,621

Enterprise resource planning system

3,181

Rio Grande Site Lease initial direct costs

946

Total other non-current assets

$ 6,748

[1]	Permitting costs primarily represent costs incurred in connection with our permit applications to the United States Army Corps of Engineers and the U.S. Fish and Wildlife Service for wetlands and habitat mitigation measures that may be caused by the construction of the Terminal and the Pipeline.

Note 3 - Prepaid Expenses and Other Current Assets (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Prepaid Expense and Other Current Assets [Table Text Block]

	December 31,		December 31,
	2019		2018
Rio Grande LNG site option	$	—	$	486
Prepaid subscriptions		161		—
Prepaid insurance		292		233
Prepaid marketing and sponsorships		25		242
Other		381		349
Total prepaid expenses and other current assets	$	859	$	1,310

Note 9 - Preferred Stock and Common Stock Warrants - Allocation of Net Cash Proceeds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Proceeds from equity issuance	$ 70,945	$ 79,055
Equity issuance costs		(2,104)
Net proceeds - Initial Fair Value Allocation		76,951
Additional Paid-in Capital [Member] \| Beneficial Conversion Feature [Member]
Net proceeds - Initial Fair Value Allocation
Per balance sheet upon issuance		2,530
Allocation to BCF		2,530
Series B Warrants [Member]
Net proceeds - Initial Fair Value Allocation	1,936	2,746
Per balance sheet upon issuance	1,936	2,746
Allocation to BCF
Series A Warrants [Member]
Net proceeds - Initial Fair Value Allocation		4,859
Per balance sheet upon issuance		4,859
Allocation to BCF
Convertible Preferred Stock [Member]
Proceeds from equity issuance	20,945
Equity issuance costs
Net proceeds - Initial Fair Value Allocation	20,945
Series B Convertible Preferred Stock [Member]
Net proceeds - Initial Fair Value Allocation	19,009	26,159
Per balance sheet upon issuance	$ 19,009	26,159
Allocation to BCF
Series A Convertible Preferred Stock [Member]
Net proceeds - Initial Fair Value Allocation		41,079
Per balance sheet upon issuance		38,549
Allocation to BCF		(2,530)
Series A Convertible Preferred Stock [Member] \| Additional Paid-in Capital [Member]
Allocation to BCF		2,500
Common Stock [Member] \| Additional Paid-in Capital [Member]
Net proceeds - Initial Fair Value Allocation		2,108
Per balance sheet upon issuance		2,108
Allocation to BCF

Note 11 - Share-based Compensation - Summary of Share-based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Equity awards	$ (8,525)	$ 19,032
Liability awards		(2,400)
Total share-based compensation	(8,525)	16,632
Capitalized share-based compensation	(1,121)	208
Total share-based compensation expense	$ (9,646)	$ 16,840

Note 11 - Share-based Compensation - Summary of Restricted Stock Outstanding (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Non-vested, Shares (in shares) \| shares	7,131
Non-vested, Weighted Average Grant Date Fair Value Per Share (in dollars per share) \| $ / shares	$ 9.44
Granted, Shares (in shares) \| shares	1,878
Granted, Weighted Average Grant Date Fair Value Per Share (in dollars per share) \| $ / shares	$ 5.72
Vested, Shares (in shares) \| shares	(510)
Vested, Weighted Average Grant Date Fair Value Per Share (in dollars per share) \| $ / shares	$ 7.70
Forfeited, Shares (in shares) \| shares	(3,727)
Forfeited, Weighted Average Grant Date Fair Value Per Share (in dollars per share) \| $ / shares	$ 9.67
Non-vested, Shares (in shares) \| shares	4,772
Non-vested, Weighted Average Grant Date Fair Value Per Share (in dollars per share) \| $ / shares	$ 7.95

Note 8 - Accrued Liabilities and Other Current Liabilities - Summary of Accrued Liabilities and Other Current Liabilities (Details) - USD ($)
$ in Thousands

Dec. 31, 2019

Dec. 31, 2018

Employee compensation expense

$ 4,221

$ 3,130

Terminal and Pipeline asset costs

2,503

2,014

Valve installation incentive(1)

^[1]

2,000

Accrued legal services

1,060

313

Other accrued liabilities

967

896

Total accrued liabilities and other current liabilities

$ 8,751

$ 8,353

[1]

In April 2018, we entered into an agreement with an intrastate pipeline company with assets near the Terminal which incentivizes the pipeline company to procure, permit and install a valve on an intrastate pipeline near the Terminal. We agreed that, upon the later of (i) March 31, 2019 and (ii) thirty days after the date on which the valve was installed, we would reimburse the pipeline company a cash amount equal to 50% of the costs incurred in connection with the valve, up to a maximum payment of $2.0 million.. Such valve was installed in 2018 and we reimbursed the pipeline company $2.0 million in the first quarter of 2019.

Note 15 - Subsequent Events (Details Textual) - USD ($) $ in Millions	Mar. 02, 2020	Feb. 13, 2020	Mar. 01, 2020	Dec. 31, 2019
Enterprise Resource Planning [Member]
Other Commitment, Due in Next Twelve Months				$ 5.5
Spectra Energy Transmission [Member]
Equity Method Investments				$ 12.6
Subsequent Event [Member] \| Enterprise Resource Planning [Member]
Other Commitment, Due in Next Twelve Months	$ 4.0		$ 5.5
Subsequent Event [Member] \| Spectra Energy Transmission [Member]
Equity Method Investment, Ownership Percentage Sold		100.00%
Equity Method Investment, Amount Sold		$ 17.4
Proceeds from Sale of Equity Method Investments	$ 15.0	$ 15.0
Business Sale, Service Agreement Period	20 years	20 years
Subsequent Event [Member] \| Spectra Energy Transmission [Member] \| Maximum [Member]
Equity Method Investment, Amount Sold		$ 25.0

Note 12 - Income Taxes

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Text Block]

Note

— Income Taxes

The reconciliation of the federal statutory income tax rate to our effective income tax rate is as follows:

	Year Ended
	December 31,
	2019			2018
U.S. federal statutory rate, beginning of year		21	%		21	%
Officers' compensation		7			(5	)
Other		(2	)		(1	)
Valuation allowance		(26	)		(15	)
Effective tax rate as reported		—	%		—	%

Significant components of our deferred tax assets and liabilities at

December 31, 2019

and

2018

are as follows (in thousands):

	Year Ended
	December 31,
	2019			2018
Deferred tax assets
Net operating loss carryforwards and credits	$	15,064		$	5,302
Share-based compensation expense		3,441			3,548
Property, plant and equipment		1,025			1,399
Common stock warrant liabilities		524			—
Operating lease liabilities		147			—
Other		21			51
Less: valuation allowance		(19,802	)		(10,300	)
Total deferred tax assets		420			—

Deferred tax liabilities
Operating lease right-of-use assets		(420	)		—
Total deferred tax liabilities		(420	)		—

Net deferred tax assets (liabilities)	$	—		$	—

The federal deferred tax assets presented above do

not

include the state tax benefits as our net deferred state tax assets are offset with a full valuation allowance.

December 31, 2019

, we had federal net operating loss (“NOL”) carryforwards of approximately

$71.7

million. Approximately

$7.9

million of these NOL carryforwards will expire between

2034

and

2037.

Due to our history of NOLs, current year NOLs and significant risk factors related to our ability to generate taxable income, we have established a valuation allowance to offset our deferred tax assets as of

December 31, 2019

and

2018

. We will continue to evaluate our ability to release the valuation allowance in the future. Due to our full valuation allowance, we have

not

recorded a provision for federal or state income taxes during the years ended

December 31, 2019

2018

. Deferred tax assets and deferred tax liabilities are classified as non-current in our Consolidated Balance Sheets.

The Tax Reform Act of

1986

(as amended) contains provisions that limit the utilization of NOL and tax credit carryforwards if there has been a change in ownership as described in Section

382

of the Internal Revenue Code (“Section

382”

). Substantial changes in the Company's ownership have occurred that

may

limit or reduce the amount of NOL carryforwards that the Company could utilize in the future to offset taxable income. The Company has

not

completed a detailed Section

382

study at this time to determine what impact, if any, that ownership changes

may

have had on its NOL carryforwards. In each period since its inception, the Company has recorded a valuation allowance for the full amount of its deferred tax assets, as the realization of the deferred tax asset is uncertain. As a result, the Company has

not

recognized any federal or state income tax benefit in its Consolidated Statement of Operations.

We remain subject to periodic audits and reviews by taxing authorities; however, we did

not

have any open income tax audits as of

December 31, 2019.

The federal tax returns for the years beginning

2015

remain open for examination.

Note 9 - Preferred Stock and Common Stock Warrants (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended			9 Months Ended	12 Months Ended
	Jan. 15, 2020	May 31, 2019	Sep. 30, 2018	Aug. 31, 2018	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Gain (Loss) on Revaluation of Warrants						$ (2,657)	$ 164
Proceeds from Issuance of Convertible Preferred Stock and Common Stock Warrant, Net							76,951
Series A Warrants [Member]
Exercise of Warrants, Percent of Fully Diluted Common Stock Acquirable						0.71%
Class of Warrant or Right, Exercise Price of Warrants or Rights						$ 0.01
Allocation of Net Cash Proceeds
Proceeds from Issuance of Convertible Preferred Stock and Common Stock Warrant, Net							4,859
Series B Warrants [Member]
Exercise of Warrants, Percent of Fully Diluted Common Stock Acquirable						0.71%
Class of Warrant or Right, Exercise Price of Warrants or Rights						$ 0.01
Allocation of Net Cash Proceeds
Proceeds from Issuance of Convertible Preferred Stock and Common Stock Warrant, Net						$ 1,936	2,746
Common Stock Warrants [Member]
Exercise of Warrants, Threshold Trading Days						60 days
Exercise of Warrants, Threshold Consecutive Trading Days						90 days
Common Stock [Member]
Stock Issued During Period, Shares, New Issues						10,094,000
Common Stock [Member] \| Backstop Agreements [Member]
Stock Issued During Period, Shares, New Issues				413,658
Series A Convertible Preferred Stock [Member]
Temporary Equity, Stock Issued During Period, Shares, New Issues				50,000
Temporary Equity, Par or Stated Value Per Share				$ 0.0001
Temporary Equity, Issued Price Per Share				$ 1,000
Temporary Equity, Stock Issued During Period, Value, New Issues				$ 50,000
Temporary Equity, Stock Issued During Period, Shares Issued for Services				1,000
Allocation of Net Cash Proceeds							(2,530)
Proceeds from Issuance of Convertible Preferred Stock and Common Stock Warrant, Net							41,079
Preferred Stock, Convertible, Conversion Price						$ 7.50
Accretion of Discount Amount						$ 2,500
Series A Convertible Preferred Stock [Member] \| Fund Purchasers [Member]
Preferred Stock, Convertible, Conversion Price						$ 5.58
Series A Convertible Preferred Stock [Member] \| HGC [Member]
Preferred Stock, Convertible, Conversion Price						$ 6.24
Series A Convertible Preferred Stock [Member] \| Additional Paid-in Capital [Member]
Allocation of Net Cash Proceeds							2,500
Series B Convertible Preferred Stock [Member]
Temporary Equity, Stock Issued During Period, Shares, New Issues		20,945	29,055
Temporary Equity, Par or Stated Value Per Share			$ 0.0001
Temporary Equity, Issued Price Per Share		$ 1,000	$ 1,000
Temporary Equity, Stock Issued During Period, Value, New Issues		$ 20,945	$ 29,055
Temporary Equity, Stock Issued During Period, Shares Issued for Services		418	581
Allocation of Net Cash Proceeds
Proceeds from Issuance of Convertible Preferred Stock and Common Stock Warrant, Net						$ 19,009	$ 26,159
Convertible Preferred Stock [Member]
Temporary Equity, Issued Price Per Share					$ 1,000
Temporary Equity, Redemption Price Per Share						$ 7.34
Temporary Stock, Threshold Trading Days for Conversion						60 days
Temporary Stock, Threshold Consecutive Trading Days for Conversion						90 days
Temporary Stock, Conversion Price Minimum Percentage						175.00%
Temporary Stock, Maximum Business Days Following FID Event for Conversion						10 days
Temporary Equity, Dividend Rate Percentage					12.00%
Dividends, Preferred Stock, Paid-in-kind						$ 11,200
Proceeds from Issuance of Convertible Preferred Stock and Common Stock Warrant, Net						$ 20,945
Convertible Preferred Stock [Member] \| Subsequent Event [Member]
Dividends, Preferred Stock, Paid-in-kind	$ 3,400

Note 7 - Other Non-current Assets

12 Months Ended

Dec. 31, 2019

Other Assets Disclosure [Text Block]

Note

— Other Non-Current Assets

Other non-current assets consisted of the following (in thousands):	December 31,		December 31,
	2019		2018
Permitting costs (1)	$	2,621	$	—
Enterprise resource planning system		3,181		—
Rio Grande Site Lease initial direct costs		946
Total other non-current assets	$	6,748	$	—

(

)

Permitting costs primarily represent costs incurred in connection with our permit applications to the United States Army Corps of Engineers and the U.S. Fish and Wildlife Service for wetlands and habitat mitigation measures that

may

be caused by the construction of the Terminal and the Pipeline.

Note 15 - Subsequent Events	12 Months Ended
Note 15 - Subsequent Events	Dec. 31, 2019
Notes to Financial Statements
Subsequent Events [Text Block]	Note 15 — Subsequent Events On February 13, 2020, NextDecade LLC entered into an Omnibus Agreement (the “Omnibus Agreement”) with Spectra Energy Transmission II, LLC, a wholly owned subsidiary of Enbridge Inc. (“Buyer”), pursuant to which NextDecade LLC agreed to sell, and Buyer agreed to purchase, one hundred percent of the equity interests (the “Equity Interests”) in Rio Bravo. The purchase price for the Equity Interests (the “Purchase Price”) will be the sum of (i) approximately $17.4 million plus (ii) the amount of direct and indirect costs incurred by Rio Bravo, the Company or any of its other affiliates in respect of the Pipeline from October 1, 2019 through closing of the sale of the Equity Interests (the “Closing”), provided, however, that the Purchase Price may not exceed $25 million. At the Closing, Buyer will pay NextDecade LLC $15 million of the Purchase Price. The carrying value of such Equity Interests was $12.6 million at December 31, 2019. The remainder of the Purchase Price is to be paid within five business days after the date that Rio Grande has received, after a final positive investment decision, the initial funding for the development, construction and operation of the Terminal. Additionally, the Omnibus Agreement provides that at the Closing, Rio Bravo and an indirect wholly owned subsidiary of the Company, will enter into a precedent agreement in a form negotiated by Buyer and NextDecade LLC pursuant to which the Company will retain its rights to the natural gas firm transportation capacity on the Pipeline for a term of at least twenty years and Rio Bravo will provide firm pipeline transportation service to the Company in order to supply natural gas to the Terminal. On March 2, 2020, the Closing occurred and NextDecade LLC received proceeds of $15 million and Buyer received the Equity Interests in Rio Bravo. In addition, Rio Grande LNG Gas Supply LLC (“Rio Grande Gas Supply”), an indirect wholly owned subsidiary of the Company, entered into precedent agreements with Rio Bravo and Valley Crossing Pipeline, LLC (“VCP”), pursuant to which Rio Grande Gas Supply will retain its rights to the natural gas firm transportation capacity on the Pipeline for a term of at least twenty years and Rio Bravo and VCP will provide firm pipeline transportation service to Rio Grande Gas Supply in order to supply natural gas to the Terminal. VCP and, as of the Closing, Rio Bravo are wholly owned subsidiaries of Enbridge, Inc. As a result of the sale of the Equity Interests, our commitment with respect to wetland and habitat mitigation measures, as disclosed in Note 13 - Commitments and Contingencies , is reduced from $5.5 million to $4.0 million. We have evaluated subsequent events through March 3, 2020, the date the financial statements were issued. Any material subsequent events that occurred during this time have been properly recognized and/or disclosed in these financial statements.

Note 8 - Accrued Liabilities and Other Current Liabilities

12 Months Ended

Dec. 31, 2019

Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]

Note

— Accrued Liabilities and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

	December 31,		December 31,
	2019		2018
Employee compensation expense	$	4,221	$	3,130
Terminal and Pipeline asset costs		2,503		2,014
Valve installation incentive (1)		—		2,000
Accrued legal services		1,060		313
Other accrued liabilities		967		896
Total accrued liabilities and other current liabilities	$	8,751	$	8,353

(

)

April 2018,

we entered into an agreement with an intrastate pipeline company with assets near the Terminal which incentivizes the pipeline company to procure, permit and install a valve on an intrastate pipeline near the Terminal. We agreed that, upon the later of (i)

March 31, 2019

and (ii)

thirty

days after the date on which the valve was installed, we would reimburse the pipeline company a cash amount equal to

50%

of the costs incurred in connection with the valve, up to a maximum payment of

$2.0

million..

Such valve was installed in

2018

and we reimbursed the pipeline company

$2.0

million in the

first

quarter of

2019

Note 11 - Share-based Compensation (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Deferred Compensation Share-based Arrangements, Liability, Current	$ 182		$ 3,018
Percentage of FID Bonus Settlement of Shares	110.00%
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent	$ 200		400
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 7,300
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	328 days
Additional Paid in Capital, Ending Balance	$ 224,091		$ 180,862
Accounting Standards Update 2018-07 [Member]
Deferred Compensation Share-based Arrangements, Liability, Current		$ (2,100)
Additional Paid in Capital, Ending Balance		$ 2,100

Note 5 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, plant and equipment, net	$ 134,591	$ 92,070
Computer Equipment [Member]
Property, plant and equipment, gross	487	164
Furniture and Fixtures [Member]
Property, plant and equipment, gross	471	316
Leasehold Improvements [Member]
Property, plant and equipment, gross	547	420
Excluding Construction in Progress [Member]
Property, plant and equipment, gross	1,505	900
Less: accumulated depreciation	(793)	(542)
Property, plant and equipment, net	712	358
Construction in Progress [Member]
Property, plant and equipment, gross	133,879	91,712
Construction in Progress [Member] \| Rio Grande [Member]
Property, plant and equipment, gross	121,081	80,407
Construction in Progress [Member] \| Rio Bravo [Member]
Property, plant and equipment, gross	$ 12,798	$ 11,305

Note 3 - Prepaid Expenses and Other Current Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Rio Grande LNG Site Option Lease Expense	$ 486	$ 572

Note 6 - Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Operating lease right-of-use assets, net	$ 1,054
Current lease liabilities	698
Non-current leases	3
Lease liabilities	701
Office Leases [Member]
Operating lease right-of-use assets, net	610
Current lease liabilities	698
Non-current leases	3
Land Leases [Member]
Operating lease right-of-use assets, net	444
Current lease liabilities
Non-current leases

Document And Entity Information - USD ($) $ in Millions	12 Months Ended
Document And Entity Information - USD ($) $ in Millions	Dec. 31, 2019	Feb. 28, 2020	Jun. 28, 2019
Document Information [Line Items]
Entity Registrant Name	NextDecade Corp.
Entity Central Index Key	0001612720
Trading Symbol	next
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Small Business	true
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding (in shares)		120,837,640
Entity Public Float			$ 129
Entity Shell Company	false
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Title of 12(b) Security	Common Stock, $0.0001 par value

Note 11 - Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

	Year Ended
	December 31,
	2019			2018
Share-based compensation:
Equity awards	$	(8,525	)	$	19,032
Liability awards		—			(2,400	)
Total share-based compensation		(8,525	)		16,632
Capitalized share-based compensation		(1,121	)		208
Total share-based compensation expense	$	(9,646	)	$	16,840

Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block]

	Shares			Weighted Average Grant Date Fair Value Per Share
Non-vested at January 1, 2019		7,131		$	9.44
Granted		1,878			5.72
Vested		(510	)		7.70
Forfeited		(3,727	)		9.67
Non-vested at December 31, 2019		4,772		$	7.95

Note 14 - Recent Accounting Pronouncements

12 Months Ended

Dec. 31, 2019

New Accounting Pronouncements and Changes in Accounting Principles [Text Block]

Note

— Recent Accounting Pronouncements

The following table provides a brief description of recent accounting standards that were adopted by the Company during the reporting period:

Standard	Description	Date of Adoption	Effect on our Consolidated Financial Statements or Other Significant Matters
ASU 2016 - 02, Leases (Topic 842 )	This standard requires a lessee to recognize leases on its balance sheet by recording a lease liability representing the obligation to make future lease payments and a right-of-use asset representing the right to use the underlying asset for the lease term. A lessee is permitted to make an election not to recognize lease assets and liabilities for leases with a term of 12 months or less. The standard also modifies the definition of a lease and requires expanded disclosures. This standard may be early adopted, and must be adopted using a modified retrospective approach with certain available practical expedients.	January 1, 2019	We have adopted this accounting standard using a prospective transition approach, which applies the provisions of the new guidance at the effective date without adjusting the comparative periods presented. Upon adoption of this standard, we recognized operating lease right-of use assets of $1.6 million and operating lease liabilities of $1.9 million. See Note 6 - Leases of our Notes to Consolidated Financial Statements for additional details.
ASU 2018 - 07, Compensation-Stock Compensation (Topic 718 )	This standard simplifies aspects of share-based compensation issued to non-employees by making the guidance consistent with accounting for employee share-based compensation. The amendments specify that Topic 718 applies to all share-based payment transactions in which a grantor acquires goods or services to be used or consumed in a grantor's own operations by issuing share-based payment awards. This standard may be early adopted, and must be adopted using a modified retrospective approach.	January 1, 2019	Upon adoption of this standard, we reclassified $2.1 million from Share-based compensation liability to Additional paid-in-capital in our Consolidated Balance Sheets. The fair value of share based compensation awards to non-employees will not be remeasured subsequent to December 31, 2018.
ASU 2018 - 15, Intangibles, Goodwill and Other Internal Use Software (Subtopic 350 - 40 )	The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this update. Accordingly, the amendments in this update require an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350 - 40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. These amendments may be early adopted and are required to be applied retrospectively or prospectively to all implementation costs incurred after the date of adoption.	July 1, 2019	Upon adoption of this standard, we capitalized approximately $1.9 million of implementation costs incurred for our Enterprise Resource Planning system. The capitalized costs will be amortized over the hosting period.

Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	480,000,000	480,000,000
Common stock, shares issued (in shares)	117,300,000	106,900,000
Common stock, shares outstanding (in shares)	117,300,000	106,900,000
Treasury stock, shares (in shares)	137,860	6,425
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	900,000	900,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Series A Convertible Preferred Stock [Member]
Temporary equity, liquidation preference (in dollars per share)	$ 1,000	$ 1,000
Temporary equity, shares issued (in shares)	58,197	51,720
Temporary equity, shares oustanding (in shares)	58,197	51,720
Series B Convertible Preferred Stock [Member]
Temporary equity, liquidation preference (in dollars per share)	$ 1,000	$ 1,000
Temporary equity, shares issued (in shares)	55,645	29,636
Temporary equity, shares oustanding (in shares)	55,645	29,636

Note 1 - Background and Basis of Presentation	12 Months Ended
Note 1 - Background and Basis of Presentation	Dec. 31, 2019
Notes to Financial Statements
Business Description and Basis of Presentation [Text Block]	Note 1 — Background and Basis of Presentation NextDecade Corporation engages in development activities related to the liquefaction and sale of liquefied natural gas (“LNG”). We have focused and continue to focus our development activities on the Rio Grande LNG terminal facility at the Port of Brownsville in southern Texas (the “Terminal”) and an associated 137 -mile Rio Bravo pipeline to supply natural gas to the Terminal (the “Pipeline”). We also lease a 994 -acre site near Texas City, Texas for another potential LNG terminal (the “Galveston Bay Terminal”) that expires December 31, 2020. Our Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). All intercompany accounts and transactions have been eliminated in consolidation. Certain reclassifications have been made to conform prior period information to the current presentation. The reclassifications did not have a material effect on our consolidated financial position, results of operations or cash flows.

Note 5 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Depreciation, Total	$ 251	$ 171

Note 5 - Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Table Text Block]

	December 31,			December 31,
	2019			2018
Fixed Assets
Computers	$	487		$	164
Furniture, fixtures, and equipment		471			316
Leasehold improvements		547			420
Total fixed assets		1,505			900
Less: accumulated depreciation		(793	)		(542	)
Total fixed assets, net		712			358
Terminal and Pipeline assets (not placed in service)
Terminal		121,081			80,407
Pipeline		12,798			11,305
Total Terminal and Pipeline assets		133,879			91,712
Total property, plant and equipment, net	$	134,591		$	92,070

Note 1 - Background and Basis of Presentation (Details Textual)	Jan. 31, 2017 a
Texas City, Texas [Member]
Area of Real Estate Property	994

Note 11 - Share-based Compensation

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Text Block]

Note

— Share-based Compensation

We have granted shares of Company common stock and restricted stock to employees, consultants and non-employee directors under our

2017

Omnibus Incentive Plan (the

“2017

Plan”) and in connection with the special meeting of stockholders on

July 24, 2017.

Total share-based compensation consisted of the following (in thousands):

	Year Ended
	December 31,
	2019			2018
Share-based compensation:
Equity awards	$	(8,525	)	$	19,032
Liability awards		—			(2,400	)
Total share-based compensation		(8,525	)		16,632
Capitalized share-based compensation		(1,121	)		208
Total share-based compensation expense	$	(9,646	)	$	16,840

January 1, 2019,

we adopted Accounting Standards Update (“ASU”)

2018

07,

Compensation-Stock Compensation (“ASU

2018

07”

). This standard simplifies aspects of share-based compensation issued to non-employees by making the guidance consistent with accounting for employee share-based compensation. Upon adoption of this standard, we reclassified

$2.1

million from Share-based compensation liability to Additional paid-in-capital in our Consolidated Balance Sheets.

Certain employee contracts provided for cash bonuses upon a positive FID in the Terminal (the “FID Bonus”). In

January 2018,

the Compensation Committee (formerly the Nominating, Corporate Governance and Compensation Committee) of the board of directors approved, and certain employees party to such contracts accepted, an amendment to such contracts whereby the FID Bonuses would be settled in shares of Company common stock equal to

110%

of the FID Bonus. The associated liability for FID Bonuses to be settled in shares of Company common stock of

$0.2

million and

$0.4

million is included in share-based compensation liability in our Consolidated Balance Sheets at

December 31, 2019

and

2018

respectively.

The total unrecognized compensation costs at

December 31, 2019

relating to equity-classified awards were

$7.3

million, which is expected to be recognized over a weighted average period of

0.9

years.

Restricted stock awards are awards of Company common stock that are subject to restrictions on transfer and to a risk of forfeiture if the recipient’s employment with the Company is terminated prior to the lapse of the restrictions. Restricted stock awards vest based on service conditions and/or performance conditions. The amortization of the value of restricted stock grants is accounted for as a charge to compensation expense, or capitalized, depending on the nature of the services provided by the employee, with a corresponding increase to additional-paid-in-capital over the requisite service period.

Grants of restricted stock to employees, non-employees and non-employee directors that vest based on service and/or performance conditions are measured at the closing quoted market price of our common stock on the grant date.

The table below provides a summary of our restricted stock outstanding as of

December 31, 2019

and changes during the year ended

December 31, 2019

(in thousands, except for per share information):

	Shares			Weighted Average Grant Date Fair Value Per Share
Non-vested at January 1, 2019		7,131		$	9.44
Granted		1,878			5.72
Vested		(510	)		7.70
Forfeited		(3,727	)		9.67
Non-vested at December 31, 2019		4,772		$	7.95

Note 6 - Leases (Tables)

12 Months Ended

Dec. 31, 2019

Lessee, Operating Lease Right-of-use Assets and Liabilities [Table Text Block]

Office leases	$	610
Land leases		444
Total operating lease right-of-use assets, net	$	1,054

Office leases	$	698
Land leases		—
Total current lease liabilities		698
Non-current office leases		3
Non-current land leases		—
Total lease liabilities	$	701

Lease, Cost [Table Text Block]

Office leases	$	719
Land leases		456
Total operating lease expense		1,175
Short-term lease expense		321
Land option expense		543
Total land option and lease expense	$	2,039

Cash paid for amounts included in the measurement of operating lease liabilities:
Cash flows from operating activities	$	1,844
Noncash right-of-use assets recorded for operating lease liabilities:
Adoption of Topic 842		1,562
In exchange for new operating lease liabilities during the period		443

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

2020	$	744
2021		3
2022		—
2023		—
2024		—
Thereafter		—
Total undiscounted lease payments		747
Discount to present value		(46	)
Present value of lease liabilities	$	701

Note 10 - Net Loss Per Share Attributable to Common Stockholders

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Text Block]

Note

— Net Loss Per Share Attributable to Common Stockholders

The following table (in thousands, except for loss per share) reconciles basic and diluted weighted average common shares outstanding for the years ended

December 31, 2019

and

2018

	Year Ended
	December 31,
	2019			2018
Weighted average common shares outstanding:
Basic		109,057			106,564
Dilutive unvested stock, convertible preferred stock, Common Stock Warrants and IPO Warrants		—			—
Diluted		109,057			106,564

Basic and diluted net loss per share attributable to common stockholders	$	(0.45	)	$	(0.41	)

Potentially dilutive securities that were

not

included in the diluted net loss per share computations because their effect would have been anti-dilutive were as follows (in thousands):

	Year Ended
	December 31,
	2019		2018
Unvested stock (1)		861		498
Convertible preferred stock		13,697		3,552
Common Stock Warrants		1,662		454
IPO Warrants (2)		12,082		12,082
Total potentially dilutive common shares		28,302		16,586

(

)

Does

not

include

3.6

million shares and

10.8

million shares of unvested stock for the year ended

December 31, 2019

and

2018

because the performance conditions had

not

yet been satisfied as of

December 31, 2019

and

2018

, respectively.

(

)

The IPO Warrants are exercisable at a price of

$11.50

per share and expire

July 24, 2022.

The Company

may

redeem the Warrants at a price of

$0.01

per IPO Warrant upon

days’ notice only if the last sale price of our common stock is at least

$17.50

per share for any

trading days within a

-trading day period. If the Company redeems the IPO Warrants in this manner, the Company will have the option to do so on a cashless basis with the issuance of an economically equivalent number of shares of Company common stock.

Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Use of Estimates, Policy [Policy Text Block]

Use of Estimates

may

result in revised estimates, and actual results

may

differ from these estimates.

Concentration Risk, Credit Risk, Policy [Policy Text Block]

Concentrations of Credit Risk

may

at times be in excess of federally insured levels. We have

not

incurred losses related to these cash and cash equivalent balances to date.

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash Equivalents

We consider all highly liquid investments with an original maturity of

three

months or less when purchased to be cash equivalents.

Investment, Policy [Policy Text Block]

Investment Securities

Property, Plant and Equipment, Policy [Policy Text Block]

Property, Plant and Equipment

Generally, we begin to capitalize the costs of our development projects once construction of the individual project is probable. This assessment includes the following criteria:

•

funding for design and permitting has been identified and is expected in the near-term;

•

key vendors for development activities have been identified, and we expect to engage them at commercially reasonable terms;

•

we have committed to commencing development activities;

•

regulatory approval is probable;

•

construction financing is expected to be available at the time of a final investment decision (“FID”);

•

prospective customers have been identified and the FID is probable; and

•

receipt of customary local tax incentives, as needed for project viability, is probable.

Prior to meeting the criteria above, costs associated with a project are expensed as incurred. Expenditures for normal repairs and maintenance are expensed as incurred.

When assets are retired or disposed, the cost and accumulated depreciation are eliminated from the accounts and any gain or loss is reflected in our Consolidated Statements of Operations.

Property, plant and equipment is carried at historical cost and depreciated using the straight-line method over their estimated useful lives.

Leasehold improvements are depreciated over the lesser of the economic life of the leasehold improvement or the term of the lease, without regard to extension/renewal rights.

Management tests property, plant and equipment for impairment whenever events or changes in circumstances have indicated that the carrying amount of property, plant and equipment might

not

recoverable, the amount of impairment loss is measured as the excess, if any, of the carrying value of the asset over its estimated fair value.

Warrants [Policy Text Block]

Warrants

The Company determines the accounting classification of warrants that are issued, as either liability or equity, by

first

assessing whether the warrants meet liability classification in accordance with Accounting Standards Codification (“ASC”)

480

Distinguishing Liabilities from Equity

(“ASC

480”

), and then in accordance with ASC

815

40,

Accounting for Derivative Financial Instruments Indexed to, and Potentially Settled in, a Company’s Own Stock

(“ASC

815

40”

). Under ASC

480,

may

require settlement by issuing a variable number of shares.

If warrants do

not

meet liability classification under ASC

480,

the Company assesses the requirements under ASC

815

40,

which states that contracts that require or

may

not

require liability classification under ASC

815

40,

in order to conclude equity classification, the Company assesses whether the warrants are indexed to our common stock and whether the warrants are classified as equity under ASC

815

changes in fair value recognized after the issuance date.

Fair Value of Financial Instruments, Policy [Policy Text Block]

Fair Value of Financial Instruments

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Hierarchy Levels

and

are terms for the priority of inputs to valuation techniques used to measure fair value. Hierarchy Level

inputs are quoted prices in active markets for identical assets or liabilities. Hierarchy Level

inputs are inputs other than quoted prices included within Level

that are directly or indirectly observable for the asset or liability. Hierarchy Level

inputs are inputs that are

not

Note

–

Investment Securities

and for Common Stock Warrant liabilities as disclosed in

Note

–

Preferred Stock and Common Stock Warrants

. The carrying amount of cash and cash equivalents and accounts payable reported on the Consolidated Balance Sheets approximates fair value due to their short-term maturities.

Treasury Stock [Policy Text Block]

Treasury Stock

Earnings Per Share, Policy [Policy Text Block]

Net Loss Per Share

Note

–

Net Loss Per Share Attributable to Common Stockholders

Share-based Payment Arrangement [Policy Text Block]

Share-based Compensation

not

Income Tax, Policy [Policy Text Block]

Income Taxes

not

that a portion or all of the deferred tax assets will expire before realization of the benefit or future deductibility is

not

probable. We recognize the tax benefit from an uncertain tax position only if it is more likely than

not

that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the tax position.

Emerging Growth Company [Policy Text Block]

Emerging Growth Company and Smaller Reporting Company

The Company is an “emerging growth company,” as defined in Section

(a) of the Securities Act of

1933,

as amended (the “Securities Act”), as modified by the Jumpstart Our Business Startups Act of

2012

(the “JOBS Act”). An “emerging growth company”

may

take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are

not

emerging growth companies including, but

not

limited to,

not

being required to comply with the auditor attestation requirements of Section

404

of the Sarbanes-Oxley Act of

2002,

not

previously approved. We

may

take advantage of these reporting exemptions until we are

longer an emerging growth company.

Further, section

102

(b)(

not

emerging growth companies.

Additionally, under Rule

12b

of the Securities Exchange Act of

1934,

second

fiscal quarter was less than

$250

million. For as long as the Company remains a smaller reporting company, it

may

take advantage of certain exemptions from the SEC’s reporting requirements that are otherwise applicable to public companies that are

not

smaller reporting companies.

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenues
Operating Expenses
General and administrative expenses	22,548	35,182
Invitation to Bid Contract Costs	10,163	6,563
Land option and lease expenses	2,039	1,099
Depreciation expense	251	171
Total operating expenses	35,001	43,015
Total operating loss	(35,001)	(43,015)
Other income (expense)
(Loss) gain on Common Stock Warrant liabilities	(2,657)	164
Interest income, net	1,718	1,019
Other	69	(128)
Total other income	(870)	1,055
Net loss attributable to NextDecade Corporation	(35,871)	(41,960)
Preferred stock dividends	(11,164)	(724)
Deemed dividends on Series A Convertible Preferred Stock	(1,517)	(822)
Net loss attributable to common stockholders	$ (48,552)	$ (43,506)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.45)	$ (0.41)
Weighted average shares outstanding - basic and diluted (in shares)	109,057	106,564

Note 12 - Income Taxes - Effective Income Tax rate (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
U.S. federal statutory rate, beginning of year	21.00%	21.00%
Officers' compensation	7.00%	(5.00%)
Other	(2.00%)	(1.00%)
Valuation allowance	(26.00%)	(15.00%)
Effective tax rate as reported

Note 13 - Commitments and Contingencies	12 Months Ended
Note 13 - Commitments and Contingencies	Dec. 31, 2019
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	Note 13 — Commitments and Contingencies Other Commitments During the third quarter of 2019 , we entered into agreements with third parties for wetland and habitat mitigation measures. In connection with the wetland and habitat mitigation measures, we are committed to spend approximately $5.5 million in 2020. Legal Proceedings From time to time the Company may be subject to various claims and legal actions that arise in the ordinary course of business. We regularly analyze current information and, as necessary, provide accruals for liabilities we deem probable and estimable. As of December 31, 2019 , management was not aware of any claims or legal actions that, separately or in the aggregate, are likely to have a material adverse effect on the Company’s financial position, results of operations or cash flows, although the Company cannot guarantee that a material adverse event will not occur.

Note 13 - Commitments and Contingencies (Details Textual) $ in Millions	Dec. 31, 2019 USD ($)
Enterprise Resource Planning [Member]
Other Commitment, Due in Next Twelve Months	$ 5.5

Note 8 - Accrued Liabilities and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Accrued Expenses and Other Current Liabilities [Table Text Block]

	December 31,		December 31,
	2019		2018
Employee compensation expense	$	4,221	$	3,130
Terminal and Pipeline asset costs		2,503		2,014
Valve installation incentive (1)		—		2,000
Accrued legal services		1,060		313
Other accrued liabilities		967		896
Total accrued liabilities and other current liabilities	$	8,751	$	8,353

Note 3 - Prepaid Expenses and Other Current Assets

12 Months Ended

Dec. 31, 2019

Prepaid Expense and Other Current Assets [Text Block]

Note

— Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following (in thousands):

	December 31,		December 31,
	2019		2018
Rio Grande LNG site option	$	—	$	486
Prepaid subscriptions		161		—
Prepaid insurance		292		233
Prepaid marketing and sponsorships		25		242
Other		381		349
Total prepaid expenses and other current assets	$	859	$	1,310

During the years ended

December 31, 2019

and

2018

, we recognized

$486

thousand and

$572

thousand, respectively, of lease option expense related to the Rio Grande LNG site option which expired

November 5, 2019.

Note 5 - Property, Plant and Equipment

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment Disclosure [Text Block]

Note

— Property, Plant and Equipment

Property, plant and equipment consisted of the following (in thousands):

	December 31,			December 31,
	2019			2018
Fixed Assets
Computers	$	487		$	164
Furniture, fixtures, and equipment		471			316
Leasehold improvements		547			420
Total fixed assets		1,505			900
Less: accumulated depreciation		(793	)		(542	)
Total fixed assets, net		712			358
Terminal and Pipeline assets (not placed in service)
Terminal		121,081			80,407
Pipeline		12,798			11,305
Total Terminal and Pipeline assets		133,879			91,712
Total property, plant and equipment, net	$	134,591		$	92,070

Depreciation expense for the years ended

December 31, 2019

and

2018

was

$251

thousand and

$171

thousand, respectively.

Note 12 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets
Net operating loss carryforwards and credits	$ 15,064	$ 5,302
Share-based compensation expense	3,441	3,548
Property, plant and equipment	1,025	1,399
Common stock warrant liabilities	524
Operating lease liabilities	147
Other	21	51
Less: valuation allowance	(19,802)	(10,300)
Total deferred tax assets	420
Deferred tax liabilities
Operating lease right-of-use assets	(420)
Total deferred tax liabilities	(420)
Net deferred tax assets (liabilities)

Note 8 - Accrued Liabilities and Other Current Liabilities (Details Textual) - Intrastate Pipeline Company [Member] - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2018	Mar. 31, 2019
Percentage of Valve Costs for Reimbursement	50.00%
Maximum Reimbursement Payment Per Agreement	$ 2
Valve Reimbursement Payment		$ 2

Note 9 - Preferred Stock and Common Stock Warrants (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

	December 31,			December 31,
	2019			2018
Stock price	$	6.14		$	5.40
Exercise price	$	0.01		$	0.01
Risk-free rate		1.6	%		2.5	%
Volatility		27.6	%		33.1	%
Term (years)		1.8			2.7

Schedule of Allocation of Net Cash Proceeds [Table Text Block]

			Year Ended December 31, 2019
					Series B
			Series B		Convertible
			Warrants		Preferred
Gross proceeds	$	20,945
Equity issuance costs		—
Net proceeds - Initial Fair Value Allocation	$	20,945	$	1,936	$	19,009
Per balance sheet upon issuance			$	1,936	$	19,009

				Year Ended December 31, 2018
													Additional Paid-in Capital
								Series A			Series B				Beneficial
				Series A		Series B		Convertible			Convertible		Common		Conversion
				Warrants		Warrants		Preferred			Preferred		Stock		Feature
Gross proceeds	$	79,055
Equity issuance costs		(2,104	)
Net proceeds - Initial Fair Value Allocation	$	76,951		$	4,859	$	2,746	$	41,079		$	26,159	$	2,108	$	—
Allocation to BCF					—		—		(2,530	)		—		—		2,530
Per balance sheet upon issuance				$	4,859	$	2,746	$	38,549		$	26,159	$	2,108	$	2,530

Note 12 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards, Total	$ 71,700
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	7,900
Income Tax Expense (Benefit), Total	$ 0	$ 0
Open Tax Year	2015 2016 2017 2018 2019

Note 7 - Other Non-current Assets (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Other Assets, Noncurrent [Table Text Block]

Other non-current assets consisted of the following (in thousands):	December 31,		December 31,
	2019		2018
Permitting costs (1)	$	2,621	$	—
Enterprise resource planning system		3,181		—
Rio Grande Site Lease initial direct costs		946
Total other non-current assets	$	6,748	$	—

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating activities:
Net loss attributable to NextDecade Corporation	$ (35,871)	$ (41,960)
Adjustment to reconcile net loss to net cash used in operating activities
Depreciation	251	171
Share-based compensation expense	(9,646)	16,840
Loss (gain) on Common Stock Warrant liabilities	2,657	(164)
(Gain) loss on investment securities	(100)	114
Realized gain on investment securities	(138)
Amortization of right-of-use assets	955
Amortization of other non-current assets	127
Changes in operating assets and liabilities:
Prepaid expenses	573	440
Other current assets		349
Accounts payable	207	124
Operating lease liabilities	(1,624)
Accrued expenses and other liabilities	1,909	801
Net cash used in operating activities	(40,700)	(23,285)
Investing activities:
Acquisition of property, plant and equipment	(20,303)	(18,658)
Proceeds from sale of investment securities	77,000	17,113
Purchase of investment securities	(66,515)	(84,616)
Acquisition of other non-current assets	(6,875)
Net cash used in investing activities	(16,693)	(86,161)
Financing activities:
Proceeds from equity issuance	70,945	79,055
Preferred stock dividends	(42)	(4)
Equity issuance costs	(293)	(2,104)
Shares repurchased related to share-based compensation	(650)	(35)
Net cash provided by financing activities	69,960	76,912
Net increase (decrease) in cash and cash equivalents	12,567	(32,534)
Cash and cash equivalents – beginning of period	3,169	35,703
Cash and cash equivalents – end of period	15,736	3,169
Non-cash investing activities:
Accounts payable for acquisition of property, plant and equipment	11,351	367
Accrued liabilities for acquisition of property, plant and equipment	2,503	4,014
Common stock issued in lieu of cash	12,082
Non-cash financing activities:
Paid-in-kind dividends on Series A Convertible Preferred Stock	11,122	720
Accretion of deemed dividends on Series A Convertible Preferred Stock	$ 1,517	$ 822

Note 6 - Leases (Details Textual) $ in Thousands	Mar. 06, 2019 USD ($) a	Dec. 31, 2019 USD ($) ft²	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 31, 2017 a
Operating Lease, Liability, Total		$ 701
Operating Lease, Right-of-Use Asset		$ 1,054
Accounting Standards Update 2016-02 [Member]
Operating Lease, Liability, Total			$ 1,900
Operating Lease, Right-of-Use Asset			1,600
Deferred Rent Credit			(100)
Cumulative Effect of New Accounting Principle in Period of Adoption			$ 200	$ (213)
City of Texas City and the State of Texas [Member]
Area Available for Lease \| a					994
Lessee, Operating Lease, Term of Contract		3 years
Lessee, Operating Lease, Renewal Term		1 year
BND [Member]
Area Available for Lease \| a	984
Lessee, Operating Lease, Term of Contract	30 years
Lessee, Operating Lease, Renewal Term	10 years
Lessee, Operating Lease, Number of Consecutive Renewal Term	2
Operating Lease, Liability, Total	$ 2,300
Operating Lease, Right-of-Use Asset	$ 2,300
Houston, Texas [Member]
Area of Real Estate Property \| ft²		38,300

Note 12 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended
	December 31,
	2019			2018
U.S. federal statutory rate, beginning of year		21	%		21	%
Officers' compensation		7			(5	)
Other		(2	)		(1	)
Valuation allowance		(26	)		(15	)
Effective tax rate as reported		—	%		—	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	Year Ended
	December 31,
	2019			2018
Deferred tax assets
Net operating loss carryforwards and credits	$	15,064		$	5,302
Share-based compensation expense		3,441			3,548
Property, plant and equipment		1,025			1,399
Common stock warrant liabilities		524			—
Operating lease liabilities		147			—
Other		21			51
Less: valuation allowance		(19,802	)		(10,300	)
Total deferred tax assets		420			—

Deferred tax liabilities
Operating lease right-of-use assets		(420	)		—
Total deferred tax liabilities		(420	)		—

Net deferred tax assets (liabilities)	$	—		$	—

Note 6 - Leases - Lease Expense (Details) $ in Thousands	12 Months Ended
Note 6 - Leases - Lease Expense (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Operating lease expense	$ 1,175
Short-term lease expense	321
Land option expense	543
Total land option and lease expense	2,039
Cash flows from operating activities	1,844
Adoption of Topic 842	1,562
In exchange for new operating lease liabilities during the period	443
Office Leases [Member]
Operating lease expense	719
Land Leases [Member]
Operating lease expense	$ 456

Note 4 - Investment Securities (Details Textual)	12 Months Ended
Note 4 - Investment Securities (Details Textual)	Dec. 31, 2019
Maturity Period of Mutual Funds	1 year
Term of Mutual Fund	180 days
Percentage of Holdings Non-investment Grade Rated	0.00%
Mutual Fund [Member] \| Fitch, AAA Rating [Member]
Percentage of Investment Holdings Grade Rated	24.00%

Note 10 - Net Loss Per Share Attributable to Common Stockholders (Details Textual) - $ / shares shares in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2015
Securities Excluded from Computation of Earnings Per Share Amount, Performance Conditions	3.6	10.8
Sale of Stock, Price Per Share			$ 17.50
Number of Trading Days of Share Price			20 days
Total Number of Trading Days Considered			30 days
IPO Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 11.50
Class of Warrant or Right, Redemption Price of Warrant or Right			$ 0.01
Class of Warrant or Right, Number of Days Notice to Redeem			30 days

Note 14 - Recent Accounting Pronouncements (Details Textual) - USD ($) $ in Thousands	Jul. 01, 2019	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Lease, Right-of-Use Asset		$ 1,054
Operating Lease, Liability, Total		701
Deferred Compensation Share-based Arrangements, Liability, Current		182		3,018
Additional Paid in Capital, Ending Balance		$ 224,091		$ 180,862
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset			$ 1,600
Operating Lease, Liability, Total			1,900
Accounting Standards Update 2018-07 [Member]
Deferred Compensation Share-based Arrangements, Liability, Current			(2,100)
Additional Paid in Capital, Ending Balance			$ 2,100
Accounting Standards Update 2018-15 [Member]
Implementation Costs Capitalized	$ 1,900

Note 4 - Investment Securities

12 Months Ended

Dec. 31, 2019

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

Note

— Investment Securities

We have invested in Class L shares of the JPMorgan Managed Income Fund. The JPMorgan Managed Income Fund has an average maturity of approximately

one

year, duration of approximately

six

months, and approximately

24%

of such fund’s holdings are AAA-rated with

non-investment grade rated.

Investment securities are included in Level

of the fair value hierarchy and consisted of the following (in thousands):

	December 31,				December 31,
	2019				2018
	Fair value		Cost		Fair value		Cost
JPMorgan Managed Income Fund	$	62,207	$	62,178	$	72,453	$	72,567

Note 4 - Investment Securities - Summary of Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
JPMorgan Managed Income Fund, fair value	$ 62,207	$ 72,453
JPMorgan Managed Income Fund, cost	$ 62,178	$ 72,567

Note 10 - Net Loss Per Share Attributable to Common Stockholders (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Year Ended
	December 31,
	2019			2018
Weighted average common shares outstanding:
Basic		109,057			106,564
Dilutive unvested stock, convertible preferred stock, Common Stock Warrants and IPO Warrants		—			—
Diluted		109,057			106,564

Basic and diluted net loss per share attributable to common stockholders	$	(0.45	)	$	(0.41	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Year Ended
	December 31,
	2019		2018
Unvested stock (1)		861		498
Convertible preferred stock		13,697		3,552
Common Stock Warrants		1,662		454
IPO Warrants (2)		12,082		12,082
Total potentially dilutive common shares		28,302		16,586

Note 6 - Leases

12 Months Ended

Dec. 31, 2019