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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Income Statement [Abstract]        
Revenues, net $ 2,749 $ 2,546 $ 5,129 $ 4,632
Operating expenses:        
Cost of royalties 16 12 30 59
Research and development 7,458 10,254 15,997 19,871
General and administrative 3,526 4,792 7,510 9,683
Total operating expenses 11,000 15,058 23,537 29,613
Loss from operations (8,251) (12,512) (18,408) (24,981)
Other income:        
Interest income 92 701 185 1,216
Income (expense) related to the sale of future royalties (434) 8 (986) 86
Total other income (expense) (342) 709 (801) 1,302
Net loss $ (8,593) $ (11,803) $ (19,209) $ (23,679)
Net loss per common share, basic (in dollars per share) $ (0.68) $ (2.03) $ (1.82) $ (4.08)
Net loss per common share, diluted (in dollars per share) $ (0.68) $ (2.03) $ (1.82) $ (4.08)
Weighted average common shares, basic (in shares) 12,627,640 5,818,416 10,572,182 5,801,000
Weighted average common shares, diluted (in shares) 12,627,640 5,818,416 10,572,182 5,801,000
Net loss $ (8,593) $ (11,803) $ (19,209) $ (23,679)
Other comprehensive income:        
Unrealized loss on marketable securities 0 (296) 0 (187)
Comprehensive loss $ (8,593) $ (12,099) $ (19,209) $ (23,866)