Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS??? EQUITY (DEFICIT)

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CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT) - USD ($)
$ in Thousands
Total
Common stock and capital in excess of par value
Accumulated deficit
Balance at beginning of period (in shares) at Dec. 31, 2020 110,851,000    
Balance at beginning of period at Dec. 31, 2020 $ 201,531    
Balance at end of period (in shares) at Jun. 30, 2021 110,851,000    
Balance at end of period at Jun. 30, 2021 $ 201,531    
Balance at beginning of period (in shares) at Dec. 31, 2020   17,948,000  
Balance at beginning of period at Dec. 31, 2020 (140,363) $ 12,118 $ (152,481)
Total stockholders’ equity      
Issuance of common stock upon exercise of stock options (in shares)   992,000  
Issuance of common stock upon exercise of stock options 804 $ 804  
Stock-based compensation expense 2,132 $ 2,132  
Net loss (24,167)   (24,167)
Balance at end of period (in shares) at Jun. 30, 2021   18,940,000  
Balance at end of period at Jun. 30, 2021 $ (161,594) $ 15,054 (176,648)
Balance at beginning of period (in shares) at Mar. 31, 2021 110,851,000    
Balance at beginning of period at Mar. 31, 2021 $ 201,531    
Balance at end of period (in shares) at Jun. 30, 2021 110,851,000    
Balance at end of period at Jun. 30, 2021 $ 201,531    
Balance at beginning of period (in shares) at Mar. 31, 2021   18,550,000  
Balance at beginning of period at Mar. 31, 2021 (151,422) $ 13,505 (164,927)
Total stockholders’ equity      
Issuance of common stock upon exercise of stock options (in shares)   390,000  
Issuance of common stock upon exercise of stock options 325 $ 325  
Stock-based compensation expense 1,224 $ 1,224  
Net loss (11,721)   (11,721)
Balance at end of period (in shares) at Jun. 30, 2021   18,940,000  
Balance at end of period at Jun. 30, 2021 $ (161,594) $ 15,054 (176,648)
Balance at beginning of period (in shares) at Dec. 31, 2021 0    
Balance at beginning of period at Dec. 31, 2021 $ 0    
Balance at end of period (in shares) at Jun. 30, 2022 0    
Balance at end of period at Jun. 30, 2022 $ 0    
Balance at beginning of period (in shares) at Dec. 31, 2021 142,241,000 142,241,000  
Balance at beginning of period at Dec. 31, 2021 $ 149,679 $ 352,881 (203,202)
Total stockholders’ equity      
Issuance of common stock upon exercise of stock options (in shares) 1,121,000 1,121,000  
Issuance of common stock upon exercise of stock options $ 1,556 $ 1,556  
Issuance of common stock under the employee stock purchase plan (in shares) 497,000    
Issuance of common stock under the employee stock purchase plan $ 2,027    
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures 31,000    
Stock-based compensation expense $ 15,380 $ 15,380  
Net loss $ (33,923)   (33,923)
Balance at end of period (in shares) at Jun. 30, 2022 143,890,000 143,890,000  
Balance at end of period at Jun. 30, 2022 $ 134,719 $ 371,844 (237,125)
Balance at beginning of period (in shares) at Mar. 31, 2022 0    
Balance at beginning of period at Mar. 31, 2022 $ 0    
Balance at end of period (in shares) at Jun. 30, 2022 0    
Balance at end of period at Jun. 30, 2022 $ 0    
Balance at beginning of period (in shares) at Mar. 31, 2022   142,806,000  
Balance at beginning of period at Mar. 31, 2022 142,277 $ 360,682 (218,405)
Total stockholders’ equity      
Issuance of common stock upon exercise of stock options (in shares)   556,000  
Issuance of common stock upon exercise of stock options $ 1,032 $ 1,032  
Issuance of common stock under the employee stock purchase plan (in shares) 497,000    
Issuance of common stock under the employee stock purchase plan $ 2,027    
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures 31,000    
Stock-based compensation expense $ 8,103 $ 8,103  
Net loss $ (18,720)   (18,720)
Balance at end of period (in shares) at Jun. 30, 2022 143,890,000 143,890,000  
Balance at end of period at Jun. 30, 2022 $ 134,719 $ 371,844 $ (237,125)