Quarterly report pursuant to Section 13 or 15(d)

CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY

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CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Total
Balance at Dec. 31, 2018 $ 13 $ 339,397 $ (332,579) $ 6,831
Balance (in shares) at Dec. 31, 2018 13,010      
Net loss $ 0 0 (4,517) (4,517)
Issuance of common stock upon exercises of warrants, net $ 0 605 0 605
Issuance of common stock upon exercises of warrants, net (in shares) 404      
Stock-based compensation $ 0 136 0 136
Balance at Mar. 31, 2019 $ 13 340,138 (337,096) 3,055
Balance (in shares) at Mar. 31, 2019 13,414      
Balance at Dec. 31, 2019 $ 57 350,413 (349,037) 1,433
Balance (in shares) at Dec. 31, 2019 57,379      
Net loss $ 0 0 (5,584) (5,584)
Issuance of common stock, net $ 9 443 0 452
Issuance of common stock, net (in shares) 8,700      
Issuance of common stock upon exercises of warrants, net $ 27 6,135 0 6,162
Issuance of common stock upon exercises of warrants, net (in shares) 27,388      
Reclassification of warrants from liability $ 0 2,897 0 2,897
Stock-based compensation 0 (84) 0 (84)
Balance at Mar. 31, 2020 $ 93 $ 359,804 $ (354,621) $ 5,276
Balance (in shares) at Mar. 31, 2020 93,467