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Income Taxes - Schedule of Components of Deferred Tax Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Deferred Tax Assets:    
NOL carryforwards $ 104,122 $ 91,036
Research and development tax credit carryforwards 18,220 16,973
Orphan drug tax credit carryforwards 26,885 24,983
Depreciation and amortization 4,597 5,552
Capitalized research and development expenditures 41,283 42,271
Stock options 5,571 4,857
Accrued expenses and other 154 973
Oberland agreement 9,336 11,640
Lease liability 807 763
Total gross deferred tax asset 210,975 199,048
Valuation allowance (210,112) (198,212)
Net deferred tax asset 863 836
Deferred tax liabilities:    
Right of use asset (863) (836)
Total gross deferred tax liabilities (863) (836)
Net deferred tax assets (liabilities) $ 0 $ 0