Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Basis of Presentation, Principles of Consolidation and Significant Accounting Policies - Assets and Liabilities at Fair Value Measured on a Recurring Basis (Details)

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Note 2 - Basis of Presentation, Principles of Consolidation and Significant Accounting Policies - Assets and Liabilities at Fair Value Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Fair value of warrant liability $ 9,049 $ 5,818
Fair Value, Inputs, Level 1 [Member]    
Fair value of warrant liability 0 0
Fair Value, Inputs, Level 2 [Member]    
Fair value of warrant liability 0 0
Fair Value, Inputs, Level 3 [Member]    
Fair value of warrant liability $ 9,049 $ 5,818