Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Risks and Uncertainties (Details Textual)

v3.20.2
Note 2 - Risks and Uncertainties (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Retained Earnings (Accumulated Deficit), Ending Balance $ (64,709)           $ (64,709)   $ (56,617)  
Net Income (Loss) Attributable to Parent, Total (3,193) $ (2,474) $ (2,425) $ (2,448) $ (2,469) $ (3,252) (8,092) $ (8,169)    
Net Cash Provided by (Used in) Operating Activities, Total             (6,169) (7,237)    
Cash, Cash Equivalents, and Short-term Investments, Total 9,800           9,800      
Marketable Securities, Total 20,800           20,800      
Working Capital 29,700           29,700      
Stockholders' Equity Attributable to Parent, Ending Balance $ 29,758 $ 11,272 $ 13,323 $ 9,700 $ 11,702 $ 13,906 $ 29,758 $ 9,700 $ 7,617 $ 17,025