Annual report pursuant to Section 13 and 15(d)

Statements of Stockholders' Equity

v3.22.1
Statements of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Total
Beginning Balance at Dec. 31, 2019 $ 94 $ 443,129 $ (413,145) $ 30,078
Beginning Balance (in shares) at Dec. 31, 2019 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
Ending Balance (in shares) at Dec. 31, 2020 159,999,917     159,999,917
Increase (Decrease) in Stockholders' Equity        
Stock-based compensation expense   4,407   $ 4,407
Exercise of stock options   187   187
Exercise of stock options (in shares) 146,559      
Issuance of common stock, net of issuance costs $ 4 7,944   7,948
Issuance of common stock, net of issuance costs (in shares) 4,277,902      
Issuance of common stock upon vesting of RSUs, net of shares withheld for employee taxes $ 1 (394)   (393)
Issuance of common stock upon vesting of RSUs, net of shares withheld for employee taxes (in shares) 1,095,629      
Net loss     (51,588) (51,588)
Ending Balance at Dec. 31, 2021 $ 165 $ 558,566 $ (494,102) $ 64,629
Ending Balance (in shares) at Dec. 31, 2021 165,520,007     165,520,007