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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, 2023   17,045,954    
Beginning balance at Dec. 31, 2023 $ 22,694 $ 17 $ 301,893 $ (279,216)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of stock from vested restricted stock units (in shares)   217,056    
Issuance of stock under Employee Stock Purchase Plan (in shares)   54,605    
Issuance of stock under Employee Stock Purchase Plan 104   104  
Exercise of stock options (in shares)   326    
Stock-based compensation 553   553  
Net loss (3,360)     (3,360)
Ending balance (in shares) at Mar. 31, 2024   17,317,941    
Ending balance at Mar. 31, 2024 $ 19,991 $ 17 302,550 (282,576)
Beginning balance (in shares) at Dec. 31, 2024 17,640,328 17,640,328    
Beginning balance at Dec. 31, 2024 $ 9,540 $ 18 303,853 (294,331)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of stock from vested restricted stock units (in shares)   229,151    
Issuance of stock under Employee Stock Purchase Plan (in shares) 80,554 80,554    
Issuance of stock under Employee Stock Purchase Plan $ 198   198  
Exercise of stock options (in shares) 0      
Stock-based compensation $ 417   417  
Net loss $ (3,752)     (3,752)
Ending balance (in shares) at Mar. 31, 2025 17,950,033 17,950,033    
Ending balance at Mar. 31, 2025 $ 6,403 $ 18 $ 304,468 $ (298,083)