Annual report pursuant to Section 13 and 15(d)

STATEMENTS OF STOCKHOLDERS' EQUITY

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STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Preferred Stock
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Total
Balance at Dec. 31, 2018 $ 0 $ 1 $ 339,409 $ (332,579) $ 6,831
Balance (in shares) at Dec. 31, 2018 0 434,000      
Net loss $ 0 $ 0 0 (16,458) (16,458)
Issuance of common stock, net $ 0 $ 1 8,236 0 8,237
Issuance of common stock, net (in shares) 0 1,257,000      
Issuance of common stock upon exercises of warrants, net $ 0 $ 0 1,601 0 1,601
Issuance of common stock upon exercises of warrants, net (in shares) 0 207,000      
Issuance of common stock upon conversion of convertible debt $ 0 $ 0 650 0 650
Issuance of common stock upon conversion of convertible debt (in shares) 0 15,000      
Stock-based compensation $ 0 $ 0 572 0 572
Balance at Dec. 31, 2019 $ 0 $ 2 350,468 (349,037) 1,433
Balance (in shares) at Dec. 31, 2019 0 1,913,000      
Net loss $ 0 $ 0 0 (18,242) (18,242)
Issuance of common stock, net $ 0 $ 4 10,190 0 10,194
Issuance of common stock, net (in shares) 0 3,605,000      
Issuance of common stock upon exercises of warrants, net $ 0 $ 2 7,241 0 $ 7,243
Issuance of common stock upon exercises of warrants, net (in shares) 0 1,563,000     450,761
Reverse stock split adjustments $ 0 $ (1) 1 0 $ 0
Reverse stock split adjustments (in shares) 0 58,000      
Reclassification of liability-classified warrants to equity $ 0 $ 0 2,897 0 2,897
Stock-based compensation 0 0 7 0 7
Balance at Dec. 31, 2020 $ 0 $ 7 $ 370,804 $ (367,279) $ 3,532
Balance (in shares) at Dec. 31, 2020 0 7,139,000