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Statements Of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Other Comprehensive Income [Member]
Accumulated Deficit [Member]
Total
Balance at Dec. 31, 2018 $ 17 $ 183,567 $ (163,956) $ 19,628
Balance, Shares at Dec. 31, 2018 17,219,300        
Stock options for employees 1,287 1,287
Stock options for non-employees 9 9
Issuance costs from 2018 sale of common stock and warrants (60) (60)
Issuance of common stock pursuant to exercise of warrants $ 5 5,861 5,866
Issuance of common stock pursuant to exercise of warrants, shares 4,622,510        
Net loss (4,631) (4,631)
Balance at Dec. 31, 2019 $ 22 190,664 (168,587) 22,099
Balance, Shares at Dec. 31, 2019 21,841,810        
Stock options for employees 961 961
Stock options for non-employees 27 27
Issuance of common stock pursuant to exercise of stock options 256 $ 256
Issuance of common stock pursuant to exercise of stock options, shares 71,105       71,105
Issuance of common stock pursuant to exercise of warrants $ 4 4,936 $ 4,940
Issuance of common stock pursuant to exercise of warrants, shares 3,950,072        
Common stock issued in conjunction with follow-on public offering, net of issuance costs $ 9 70,242 70,251
Common stock issued in conjunction with follow-on public offering, net of issuance costs, shares 9,375,000        
Net loss (6,334) (6,334)
Balance at Dec. 31, 2020 $ 35 $ 267,086 $ (174,921) $ 92,200
Balance, Shares at Dec. 31, 2020 35,237,987