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CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($)
$ in Thousands
Convertible preferred stock (as converted to common stock)
Common Stock.
Additional Paid-in Capital
Accumulated Deficit
Total
Balance at the beginning at Dec. 31, 2020 $ 75,877        
Balance at the beginning (in shares) at Dec. 31, 2020 77,340,057        
Balance at the end at Mar. 31, 2021 $ 75,877        
Balance at the end (in shares) at Mar. 31, 2021 77,340,057        
Balance at the beginning at Dec. 31, 2020   $ 1 $ 9,194 $ (93,881) $ (84,686)
Balance at the beginning (in shares) at Dec. 31, 2020   9,846,830      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of warrants to purchase common stock     1   1
Issuance of common stock upon net exercise of stock options     455   455
Issuance of common stock upon net exercise of stock options (in shares)   1,563,281      
Stock-based compensation expense     1,082   1,082
Net loss       (13,755) (13,755)
Balance at the end at Mar. 31, 2021   $ 1 10,732 (107,636) $ (96,903)
Balance at the end (in shares) at Mar. 31, 2021   11,410,111      
Balance at the beginning (in shares) at Dec. 31, 2021         0
Balance at the beginning at Dec. 31, 2021   $ 14 395,563 (104,739) $ 290,838
Balance at the beginning (in shares) at Dec. 31, 2021   142,745,021      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of common stock upon net exercise of stock options     216   $ 216
Issuance of common stock upon net exercise of stock options (in shares)   496,971     499,767
Issuance of common stock upon vesting of restricted stock units (in shares)   80,044      
Stock-based compensation expense     3,645   $ 3,645
Net loss       (14,551) (14,551)
Balance at the end at Mar. 31, 2022   $ 14 $ 399,424 $ (119,290) $ 280,148
Balance at the end (in shares) at Mar. 31, 2022   143,322,036