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Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($)
$ in Thousands
Common Stock Outstanding [Member]
Treasury Stock, Common [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2023 14,384,936        
Balance at Dec. 31, 2023 $ 43 $ (11,407) $ 427,286 $ (381,518) $ 34,404
Balance (in shares) at Dec. 31, 2023   768,595      
Vesting of restricted stock units and issuance of stock under incentive plans (in shares) 305,348 0      
Vesting of restricted stock units and issuance of stock under incentive plans $ 2 $ 0 (2) 0 0
Share-based compensation 0 0 1,522 0 1,522
Issuance of common stock, pre-funded warrants and common stock warrants $ 0 0 9,900 0 9,900
Exercise of pre-funded warrants (in shares) 2,955,084        
Exercise of pre-funded warrants $ 1 0 (1) 0 0
Net loss $ 0 0 0 (25,847) (25,847)
Balance (in shares) at Sep. 30, 2024 17,645,368        
Balance at Sep. 30, 2024 $ 46 $ (11,407) 438,705 (407,365) 19,979
Balance (in shares) at Sep. 30, 2024   768,595      
Balance (in shares) at Jun. 30, 2024 14,680,246        
Balance at Jun. 30, 2024 $ 44 $ (11,407) 438,237 (399,421) 27,453
Balance (in shares) at Jun. 30, 2024   768,595      
Vesting of restricted stock units and issuance of stock under incentive plans (in shares) 10,038 0      
Vesting of restricted stock units and issuance of stock under incentive plans $ 1 $ 0 (1) 0 0
Share-based compensation 0 0 470 0 470
Exercise of pre-funded warrants 1 0 (1) 0 0
Net loss $ 0 0 0 (7,944) (7,944)
Issuance of pre-funded warrants (in shares) 2,955,084        
Balance (in shares) at Sep. 30, 2024 17,645,368        
Balance at Sep. 30, 2024 $ 46 $ (11,407) 438,705 (407,365) 19,979
Balance (in shares) at Sep. 30, 2024   768,595      
Balance (in shares) at Dec. 31, 2024 20,791,431        
Balance at Dec. 31, 2024 $ 47 $ (11,407) 447,110 (410,795) $ 24,955
Balance (in shares) at Dec. 31, 2024   768,595     768,595
Vesting of restricted stock units and issuance of stock under incentive plans (in shares) 368,094        
Vesting of restricted stock units and issuance of stock under incentive plans $ 1 $ 0 (1) 0 $ 0
Share-based compensation $ 0 $ 0 1,174 0 1,174
Issuance of common stock, pre-funded warrants and common stock warrants (in shares) 3,542,856 0      
Issuance of common stock, pre-funded warrants and common stock warrants $ 2 $ 0 18,503 0 18,505
Exercise of pre-funded warrants (in shares) 5,585,216        
Exercise of pre-funded warrants $ 3 0 (3) 0 0
Net loss $ 0 0 0 (23,048) (23,048)
Balance (in shares) at Sep. 30, 2025 30,287,597        
Balance at Sep. 30, 2025 $ 53 $ (11,407) 466,783 (433,843) $ 21,586
Balance (in shares) at Sep. 30, 2025   768,595     768,595
Balance (in shares) at Jun. 30, 2025 25,037,334        
Balance at Jun. 30, 2025 $ 50 $ (11,407) 456,767 (426,287) $ 19,123
Balance (in shares) at Jun. 30, 2025   768,595      
Vesting of restricted stock units and issuance of stock under incentive plans (in shares) 50,264 0      
Vesting of restricted stock units and issuance of stock under incentive plans $ 0 $ 0 0 0 0
Share-based compensation $ 0 0 486 0 486
Issuance of common stock, pre-funded warrants and common stock warrants (in shares) 3,542,856        
Issuance of common stock, pre-funded warrants and common stock warrants $ 2 0 9,531 0 9,533
Exercise of pre-funded warrants (in shares) 1,657,143        
Exercise of pre-funded warrants $ 1 0 (1) 0 0
Net loss $ 0 0 0 (7,556) (7,556)
Balance (in shares) at Sep. 30, 2025 30,287,597        
Balance at Sep. 30, 2025 $ 53 $ (11,407) $ 466,783 $ (433,843) $ 21,586
Balance (in shares) at Sep. 30, 2025   768,595     768,595