000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Consolidated Balance Sheets (Current Period Unaudited) link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Consolidated Statements of Operations (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Consolidated Statement of Stockholders' Equity and Convertible Preferred Stock (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Consolidated Statements of Cash Flows (Unaudited) link:calculationLink link:definitionLink link:presentationLink 006 - Disclosure - Note 1 - Background and Basis of Presentation link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 2 - Prepaid Expenses and Other Current Assets link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 3 - Sale of Equity Interests in Rio Bravo link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Property, Plant and Equipment link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - Leases link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Other Non-current Assets link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Accrued Liabilities and Other Current Liabilities link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Preferred Stock and Common Stock Warrants link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Shareholders' Equity link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Net Loss Per Share link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 11 - Share-based Compensation link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 12 - Income Taxes link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 13 - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 14 - Recent Accounting Pronouncements link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 021 - Disclosure - Note 2 - Prepaid Expenses and Other Current Assets (Tables) link:calculationLink link:definitionLink link:presentationLink 022 - Disclosure - Note 4 - Property, Plant and Equipment (Tables) link:calculationLink link:definitionLink link:presentationLink 023 - Disclosure - Note 5 - Leases (Tables) link:calculationLink link:definitionLink link:presentationLink 024 - Disclosure - Note 6 - Other Non-current Assets (Tables) link:calculationLink link:definitionLink link:presentationLink 025 - Disclosure - Note 7 - Accrued Liabilities and Other Current Liabilities (Tables) link:calculationLink link:definitionLink link:presentationLink 026 - Disclosure - Note 8 - Preferred Stock and Common Stock Warrants (Tables) link:calculationLink link:definitionLink link:presentationLink 027 - Disclosure - Note 10 - Net Loss Per Share (Tables) link:calculationLink link:definitionLink link:presentationLink 028 - Disclosure - Note 11 - Share-based Compensation (Tables) link:calculationLink link:definitionLink link:presentationLink 029 - Disclosure - Note 1 - Background and Basis of Presentation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 030 - Disclosure - Note 2 - Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Details) link:calculationLink link:definitionLink link:presentationLink 031 - Disclosure - Note 3 - Sale of Equity Interests in Rio Bravo (Details Textual) link:calculationLink link:definitionLink link:presentationLink 032 - Disclosure - Note 4 - Property, Plant and Equipment (Details Textual) link:calculationLink link:definitionLink link:presentationLink 033 - Disclosure - Note 4 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) link:calculationLink link:definitionLink link:presentationLink 034 - Disclosure - Note 5 - Leases - Supplemental Balance Sheet Information Related to Leases (Details) link:calculationLink link:definitionLink link:presentationLink 035 - Disclosure - Note 5 - Leases - Lease Expense (Details) link:calculationLink link:definitionLink link:presentationLink 036 - Disclosure - Note 5 - Leases - Maturity of Operating Lease (Details) link:calculationLink link:definitionLink link:presentationLink 037 - Disclosure - Note 6 - Other Non-current Assets - Schedule of Other Non-current Assets (Details) link:calculationLink link:definitionLink link:presentationLink 038 - Disclosure - Note 7 - Accrued Liabilities and Other Current Liabilities - Summary of Accrued Liabilities and Other Current Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 039 - Disclosure - Note 8 - Preferred Stock and Common Stock Warrants (Details Textual) link:calculationLink link:definitionLink link:presentationLink 040 - Disclosure - Note 8 - Preferred Stock and Common Stock Warrants - Allocation of Net Cash Proceeds (Details) link:calculationLink link:definitionLink link:presentationLink 041 - Disclosure - Note 8 - Preferred Stock and Common Stock Warrants - Fair Value Assumptions (Details) link:calculationLink link:definitionLink link:presentationLink 042 - Disclosure - Note 9 - Shareholders' Equity (Details Textual) link:calculationLink link:definitionLink link:presentationLink 043 - Disclosure - Note 10 - Net Loss Per Share - Basic and Diluted Common Shares (Details) link:calculationLink link:definitionLink link:presentationLink 044 - Disclosure - Note 10 - Net Loss Per Share - Anti-dilutive Securities (Details) link:calculationLink link:definitionLink link:presentationLink 045 - Disclosure - Note 11 - Share-based Compensation - Summary of Share-based Compensation (Details) link:calculationLink link:definitionLink link:presentationLink 046 - Disclosure - Note 12 - Income Taxes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 047 - Disclosure - Note 13 - Commitments and Contingencies (Details Textual) link:calculationLink link:definitionLink link:presentationLink