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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Accumulated Other Comprehensive Loss
Accumulated Deficit
Balance at Dec. 31, 2020 $ 103,891 $ 502,217 $ (95) $ (398,231)
Balance, Shares at Dec. 31, 2020   27,175,305    
Issuance of common stock upon the exercise of common stock options 372 $ 372    
Issuance of common stock upon the exercise of common stock options, Shares   287,705    
Issuance of common stock in connection with employee stock purchase plan 211 $ 211    
Issuance of common stock in connection with employee stock purchase plan , Shares   14,951    
Stock-based compensation expense 1,112 $ 1,112    
Foreign currency translation adjustment (2)   (2)  
Unrealized gains (losses) on marketable securities 8   8  
Net loss (7,917)     (7,917)
Balance at Mar. 31, 2021 97,675 $ 503,912 (89) (406,148)
Balance, Shares at Mar. 31, 2021   27,477,961    
Balance at Dec. 31, 2020 103,891 $ 502,217 (95) (398,231)
Balance, Shares at Dec. 31, 2020   27,175,305    
Foreign currency translation adjustment (26)      
Unrealized gains (losses) on marketable securities (10)      
Net loss (31,547)      
Balance at Sep. 30, 2021 78,549 $ 508,458 (131) (429,778)
Balance, Shares at Sep. 30, 2021   27,764,885    
Balance at Dec. 31, 2020 103,891 $ 502,217 (95) (398,231)
Balance, Shares at Dec. 31, 2020   27,175,305    
Net loss (44,200)      
Balance at Dec. 31, 2021 67,854 $ 510,488 (188) (442,446)
Balance, Shares at Dec. 31, 2021   27,791,615    
Balance at Mar. 31, 2021 97,675 $ 503,912 (89) (406,148)
Balance, Shares at Mar. 31, 2021   27,477,961    
Issuance of common stock upon the exercise of common stock options 213 $ 213    
Issuance of common stock upon the exercise of common stock options, Shares   169,273    
Stock-based compensation expense 1,808 $ 1,808    
Foreign currency translation adjustment (27)   (27)  
Unrealized gains (losses) on marketable securities (18)   (18)  
Net loss (10,668)     (10,668)
Balance at Jun. 30, 2021 88,983 $ 505,933 (134) (416,816)
Balance, Shares at Jun. 30, 2021   27,647,234    
Issuance of common stock upon the exercise of common stock options 344 $ 344    
Issuance of common stock upon the exercise of common stock options, Shares   104,753    
Issuance of common stock in connection with employee stock purchase plan 208 $ 208    
Issuance of common stock in connection with employee stock purchase plan , Shares   12,898    
Stock-based compensation expense 1,973 $ 1,973    
Foreign currency translation adjustment 3   3  
Net loss (12,962)     (12,962)
Balance at Sep. 30, 2021 78,549 $ 508,458 (131) (429,778)
Balance, Shares at Sep. 30, 2021   27,764,885    
Balance at Dec. 31, 2021 67,854 $ 510,488 (188) (442,446)
Balance, Shares at Dec. 31, 2021   27,791,615    
Issuance of common stock upon the exercise of common stock options 202 $ 202    
Issuance of common stock upon the exercise of common stock options, Shares   164,503    
Issuance of common stock in connection with employee stock purchase plan 203 $ 203    
Issuance of common stock in connection with employee stock purchase plan , Shares   12,465    
Stock-based compensation expense 2,310 $ 2,310    
Foreign currency translation adjustment (24)   (24)  
Unrealized gains (losses) on marketable securities (73)   (73)  
Net loss (10,562)     (10,562)
Balance at Mar. 31, 2022 59,910 $ 513,203 (285) (453,008)
Balance, Shares at Mar. 31, 2022   27,968,583    
Balance at Dec. 31, 2021 67,854 $ 510,488 (188) (442,446)
Balance, Shares at Dec. 31, 2021   27,791,615    
Foreign currency translation adjustment (95)      
Unrealized gains (losses) on marketable securities 36      
Net loss (29,511)      
Balance at Sep. 30, 2022 187,857 $ 660,061 (247) (471,957)
Balance, Shares at Sep. 30, 2022   31,933,984    
Balance at Mar. 31, 2022 59,910 $ 513,203 (285) (453,008)
Balance, Shares at Mar. 31, 2022   27,968,583    
Issuance of common stock upon the exercise of common stock options 237 $ 237    
Issuance of common stock upon the exercise of common stock options, Shares   31,592    
Issuance of restricted common stock, Shares   23,120    
Stock-based compensation expense 2,316 $ 2,316    
Foreign currency translation adjustment (30)   (30)  
Unrealized gains (losses) on marketable securities 9   9  
Net loss (11,523)     (11,523)
Balance at Jun. 30, 2022 50,919 $ 515,756 (306) (464,531)
Balance, Shares at Jun. 30, 2022   28,023,295    
Issuance of common stock in public offering, net of discounts and issuance costs of $676 139,854 $ 139,854    
Issuance of common stock in public offering, net of discounts and issuance costs, Shares   3,737,500    
Issuance of common stock upon the exercise of common stock options 1,441 $ 1,441    
Issuance of common stock upon the exercise of common stock options, Shares   154,316    
Issuance of common stock in connection with employee stock purchase plan 306 $ 306    
Issuance of common stock in connection with employee stock purchase plan , Shares   17,678    
Issuance of restricted common stock, Shares   2,973    
Restricted common stock forfeitures, Shares   (1,778)    
Stock-based compensation expense 2,704 $ 2,704    
Foreign currency translation adjustment (41)   (41)  
Unrealized gains (losses) on marketable securities 100   100  
Net loss (7,426)     (7,426)
Balance at Sep. 30, 2022 $ 187,857 $ 660,061 $ (247) $ (471,957)
Balance, Shares at Sep. 30, 2022   31,933,984