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Statements of Stockholders' Equity (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Total
Beginning balance, value at Dec. 31, 2024 $ 31 $ 246,565 $ 1 $ (221,520) $ 25,077
Beginning balance, shares at Dec. 31, 2024 30,540        
Stock-based compensation 1,009 1,009
At-the-market sale of stock, net of commissions and offering costs 2,407 2,407
At-the-market sale of stock, net of commissions and expenses, shares 164        
Net loss (5,209) (5,209)
Unrealized gain (loss) on available-for-sale securities (1) (1)
Ending balance, value at Mar. 31, 2025 $ 31 249,981 (226,729) 23,283
Ending balance, shares at Mar. 31, 2025 30,704        
Beginning balance, value at Dec. 31, 2024 $ 31 246,565 1 (221,520) 25,077
Beginning balance, shares at Dec. 31, 2024 30,540        
Net loss         (10,176)
Ending balance, value at Jun. 30, 2025 $ 31 252,956 (231,696) 21,291
Ending balance, shares at Jun. 30, 2025 31,090        
Beginning balance, value at Mar. 31, 2025 $ 31 249,981 (226,729) 23,283
Beginning balance, shares at Mar. 31, 2025 30,704        
Stock-based compensation 1,278 1,278
Stock-based compensation, shares 28        
Stock option exercises 905 905
Stock option exercises, shares 173        
At-the-market sale of stock, net of commissions and offering costs 792 792
At-the-market sale of stock, net of commissions and expenses, shares 185        
Net loss (4,967) (4,967)
Ending balance, value at Jun. 30, 2025 $ 31 252,956 (231,696) 21,291
Ending balance, shares at Jun. 30, 2025 31,090        
Beginning balance, value at Dec. 31, 2025 $ 32 260,043 (241,694) 18,381
Beginning balance, shares at Dec. 31, 2025 32,354        
Stock-based compensation 1,406 1,406
Stock-based compensation, shares 27        
Stock option exercises 124 124
Stock option exercises, shares 22        
Forfeiture of restricted stock award
Forfeiture of restricted stock award, shares (7)        
Registered direct offering of common stock, net of commissions and offering costs $ 5 23,591 23,596
Registered direct offering of common stock, net of commissions, expenses and other offering costs, shares 5,000        
At-the-market sale of stock, net of commissions and offering costs $ 2 3,137 3,139
At-the-market sale of stock, net of commissions and expenses, shares 1,320        
Net loss (6,073) (6,073)
Unrealized gain (loss) on available-for-sale securities (23) (23)
Ending balance, value at Mar. 31, 2026 $ 39 288,301 (23) (247,767) 40,550
Ending balance, shares at Mar. 31, 2026 38,716        
Beginning balance, value at Dec. 31, 2025 $ 32 260,043 (241,694) 18,381
Beginning balance, shares at Dec. 31, 2025 32,354        
Net loss         (12,409)
Ending balance, value at Jun. 30, 2026 $ 39 291,157 (18) (254,103) 37,075
Ending balance, shares at Jun. 30, 2026 39,024        
Beginning balance, value at Mar. 31, 2026 $ 39 288,301 (23) (247,767) 40,550
Beginning balance, shares at Mar. 31, 2026 38,716        
Stock-based compensation 1,741 1,741
Stock-based compensation, shares 139        
Stock option exercises 1,156 1,156
Stock option exercises, shares 169        
At-the-market sale of stock, net of commissions and offering costs (41) (41)
Net loss (6,336) (6,336)
Unrealized gain (loss) on available-for-sale securities 5 5
Ending balance, value at Jun. 30, 2026 $ 39 $ 291,157 $ (18) $ (254,103) $ 37,075
Ending balance, shares at Jun. 30, 2026 39,024