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Unaudited Condensed Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2021   16,164,994    
Beginning balance at Dec. 31, 2021 $ 84,936 $ 16 $ 293,060 $ (208,140)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of stock from vested restricted stock units and payment of employees' taxes (in shares)   30,523    
Issuance of stock from vested restricted stock units and payment of employees' taxes (115)   (115)  
Issuance of stock under Employee Stock Purchase Plan (in shares)   35,681    
Issuance of stock under Employee Stock Purchase Plan 231   231  
Stock-based compensation 1,376   1,376  
Net loss (10,272)     (10,272)
Ending balance (in shares) at Mar. 31, 2022   16,231,198    
Ending balance at Mar. 31, 2022 76,156 $ 16 294,552 (218,412)
Beginning balance (in shares) at Dec. 31, 2021   16,164,994    
Beginning balance at Dec. 31, 2021 84,936 $ 16 293,060 (208,140)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net loss (24,937)      
Ending balance (in shares) at Jun. 30, 2022   16,258,807    
Ending balance at Jun. 30, 2022 62,824 $ 16 295,885 (233,077)
Beginning balance (in shares) at Mar. 31, 2022   16,231,198    
Beginning balance at Mar. 31, 2022 76,156 $ 16 294,552 (218,412)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of stock from vested restricted stock units and payment of employees' taxes (in shares)   27,609    
Issuance of stock from vested restricted stock units and payment of employees' taxes (107)   (107)  
Stock-based compensation 1,440   1,440  
Net loss (14,665)     (14,665)
Ending balance (in shares) at Jun. 30, 2022   16,258,807    
Ending balance at Jun. 30, 2022 $ 62,824 $ 16 295,885 (233,077)
Beginning balance (in shares) at Dec. 31, 2022 16,549,984 16,549,984    
Beginning balance at Dec. 31, 2022 $ 42,460 $ 17 297,970 (255,527)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of stock from vested restricted stock units and payment of employees' taxes (in shares)   113,378    
Issuance of stock under Employee Stock Purchase Plan (in shares)   70,317    
Issuance of stock under Employee Stock Purchase Plan 152   152  
Exercise of stock options (in shares)   93,335    
Exercise of stock options 27   27  
Stock-based compensation 986   986  
Net loss (7,688)     (7,688)
Ending balance (in shares) at Mar. 31, 2023   16,827,014    
Ending balance at Mar. 31, 2023 $ 35,937 $ 17 299,135 (263,215)
Beginning balance (in shares) at Dec. 31, 2022 16,549,984 16,549,984    
Beginning balance at Dec. 31, 2022 $ 42,460 $ 17 297,970 (255,527)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net loss $ (12,701)      
Ending balance (in shares) at Jun. 30, 2023 16,858,194 16,858,194    
Ending balance at Jun. 30, 2023 $ 31,902 $ 17 300,113 (268,228)
Beginning balance (in shares) at Mar. 31, 2023   16,827,014    
Beginning balance at Mar. 31, 2023 35,937 $ 17 299,135 (263,215)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of stock from vested restricted stock units and payment of employees' taxes (in shares)   31,180    
Stock-based compensation 978   978  
Net loss $ (5,013)     (5,013)
Ending balance (in shares) at Jun. 30, 2023 16,858,194 16,858,194    
Ending balance at Jun. 30, 2023 $ 31,902 $ 17 $ 300,113 $ (268,228)