Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Basis of Presentation, Principles of Consolidation and Significant Accounting Policies - Level 3 Liabilities (Details)

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Note 2 - Basis of Presentation, Principles of Consolidation and Significant Accounting Policies - Level 3 Liabilities (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Warrant Liability Current [Member]    
Balance $ 0 $ 0
Exercise of warrants 0 0
Change in fair value - net 0 0
Issuances of warrants   0
Balance 0 0
Warrant Liability Noncurrent [Member]    
Balance 11,792 5,818
Exercise of warrants 0 (4)
Change in fair value - net (2,743) (1,489)
Issuances of warrants   4,724
Balance 9,049 9,049
Warrant Liability [Member]    
Balance 11,792 5,818
Exercise of warrants 0 (4)
Change in fair value - net (2,743) (1,489)
Issuances of warrants   4,724
Balance $ 9,049 $ 9,049