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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Loss [Member]
Total
Beginning Balance at Dec. 31, 2021 $ 4 $ 497,342 $ (293,171) $ (5,040) $ 199,135
Beginning Balance (in shares) at Dec. 31, 2021 40,993,768        
Stock-based compensation   2,033     2,033
Exercise of stock options   197     197
Exercise of stock options (in shares) 95,771        
Vesting of restricted stock awards including withholding, net   (170)     (170)
Vesting of restricted stock awards including withholding, net (in shares) 17,568        
Issuance of common stock from Employee Stock Purchase Plan   113     113
Issuance of common stock from Employee Stock Purchase Plan (in shares) 16,450        
Issuance of common stock in at the market offerings, net   2,990     2,990
Issuance of common stock in at the market offerings, net (in shares) 335,485        
Issuance of common stock upon exercise of warrants (in shares) 1,760,854        
Net loss     (19,430)   (19,430)
Ending Balance at Mar. 31, 2022 $ 4 502,505 (312,601) (5,040) 184,868
Ending Balance (in shares) at Mar. 31, 2022 43,219,896        
Beginning Balance at Dec. 31, 2021 $ 4 497,342 (293,171) (5,040) 199,135
Beginning Balance (in shares) at Dec. 31, 2021 40,993,768        
Ending Balance at Dec. 31, 2022 $ 5 568,399 (377,884) (5,227) 185,293
Ending Balance (in shares) at Dec. 31, 2022 49,199,845        
Stock-based compensation   2,675     2,675
Exercise of stock options   61     61
Exercise of stock options (in shares) 19,303        
Vesting of restricted stock awards including withholding, net   (484)     (484)
Vesting of restricted stock awards including withholding, net (in shares) 54,347        
Issuance of common stock from Employee Stock Purchase Plan   135     135
Issuance of common stock from Employee Stock Purchase Plan (in shares) 13,215        
Unrealized loss on short-term investments       126 126
Net loss     (20,074)   (20,074)
Ending Balance at Mar. 31, 2023 $ 5 $ 570,786 $ (397,958) $ (5,101) $ 167,732
Ending Balance (in shares) at Mar. 31, 2023 49,286,710