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CONDENSED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment
 [1]
Preferred Stock
Common Stock
Additional Paid-In Capital
Additional Paid-In Capital
Cumulative Effect, Period of Adoption, Adjustment
 [1]
Accumulated Other Comprehensive Loss
Accumulated Deficit
Accumulated Deficit
Cumulative Effect, Period of Adoption, Adjustment
 [1]
Balance, beginning (in shares) at Dec. 31, 2022     61 44,677          
Balance, beginning at Dec. 31, 2022 $ 106,343   $ 0 $ 4 $ 404,834   $ (395) $ (298,100)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition 1,064       1,064        
Other comprehensive gain (loss) 319           319    
Net loss (11,223)             (11,223)  
Balance, ending (in shares) at Mar. 31, 2023     61 44,677          
Balance, ending at Mar. 31, 2023 96,503   $ 0 $ 4 405,898   (76) (309,323)  
Balance, beginning (in shares) at Dec. 31, 2022     61 44,677          
Balance, beginning at Dec. 31, 2022 106,343   $ 0 $ 4 404,834   (395) (298,100)  
Balance, ending (in shares) at Dec. 31, 2023     61 44,677          
Balance, ending at Dec. 31, 2023 $ 69,739 $ 0 $ 0 $ 4 409,343 $ (793) (67) (339,541) $ 793
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Accounting Standards Update [Extensible Enumeration] Accounting Standards Update 2020-06 [Member]                
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition $ 1,124       1,124        
Issuance of common stock upon exercise of stock options (in shares)       33          
Stock Issued During Period, Value, Stock Options Exercised 107       107        
Other comprehensive gain (loss) (65)           (65)    
Net loss (10,011)             (10,011)  
Balance, ending (in shares) at Mar. 31, 2024     61 44,710          
Balance, ending at Mar. 31, 2024 $ 60,894   $ 0 $ 4 $ 409,781   $ (132) $ (348,759)  
[1] See Note 2.