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Consolidated Statements of Stockholders Equity - USD ($)
$ in Thousands
Common stock
Additional paid-in capital
Accumulated deficit
Accumulated and other comprehensive loss
Total
Balances, Beginning at Dec. 31, 2021 $ 204 $ 540,707 $ (394,754) $ (198) $ 145,959
Balances, Beginning (in shares) at Dec. 31, 2021 20,399,337        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of stock options $ 2 182     184
Exercise of stock options (in shares) 150,509        
Proceeds from Employee Stock Purchase Plan $ 1 586     587
Proceeds from Employee Stock Purchase Plan (shares) 113,890        
Employee stock compensation   3,887     3,887
Net Income (Loss)     (41,428)   (41,428)
Cumulative translation adjustment       (9) (9)
Balances, Ending at Dec. 31, 2022 $ 207 545,362 (436,182) (207) 109,180
Balances, Ending (in shares) at Dec. 31, 2022 20,663,736        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of stock options $ 1 727     728
Exercise of stock options (in shares) 144,187        
Proceeds from Employee Stock Purchase Plan $ 1 934     935
Proceeds from Employee Stock Purchase Plan (shares) 71,276        
Employee stock compensation   6,303     6,303
Net Income (Loss)     (41,199)   (41,199)
Balances, Ending at Dec. 31, 2023 $ 209 $ 553,326 $ (477,381) $ (207) $ 75,947
Balances, Ending (in shares) at Dec. 31, 2023 20,879,199