Annual report pursuant to Section 13 and 15(d)

Statements of Stockholders' Equity

v3.20.4
Statements of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Total
Beginning Balance at Dec. 31, 2018 $ 82 $ 429,727 $ (388,274) $ (9) $ 41,526
Balance (in shares) at Dec. 31, 2018 82,323,413        
Increase (Decrease) in Stockholders' Equity          
Stock-based compensation expense   3,232     3,232
Exercise of stock options   28     28
Exercise of stock options (in shares) 41,968        
Issuance of warrants to underwriters in connection with equity offering   347     347
Issuance of common stock, net of issuance costs $ 12 9,953     9,965
Issuance of common stock, net of issuance costs (in shares) 11,442,408        
Shares repurchased by the Company (in shares) (122)        
Issuance of common stock upon vesting of RSUs, net of shares withheld for employee taxes   (158)     (158)
Issuance of common stock upon vesting of RSUs, net of shares withheld for employee taxes (in shares) 406,093        
Unrealized gain on marketable securities       $ 9 9
Net loss     (24,871)   (24,871)
Ending Balance at Dec. 31, 2019 $ 94 443,129 (413,145)   $ 30,078
Balance (in shares) at Dec. 31, 2019 94,213,760       94,213,760
Increase (Decrease) in Stockholders' Equity          
Stock-based compensation expense   3,284     $ 3,284
Exercise of stock options $ 1 135     136
Exercise of stock options (in shares) 197,640        
Net exercise of common stock warrant (in shares) 201,925        
Issuance of common stock, net of issuance costs $ 64 100,946     101,010
Issuance of common stock, net of issuance costs (in shares) 64,344,354        
Issuance of common stock upon vesting of RSUs, net of shares withheld for employee taxes $ 1 (1,072)     (1,071)
Issuance of common stock upon vesting of RSUs, net of shares withheld for employee taxes (in shares) 1,042,238        
Net loss     (29,369)   (29,369)
Ending Balance at Dec. 31, 2020 $ 160 $ 546,422 $ (442,514)   $ 104,068
Balance (in shares) at Dec. 31, 2020 159,999,917       159,999,917