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Commitments, Contingencies, and Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Deferred tax assets:    
Accrued liabilities not currently deductible $ 357 $ 559
Intangible assets- excess of financial statement over tax amortization 3,276 2,096
Stock-based compensation 941 741
Federal net operating and capital losses 42,283 42,774
Research & experimental tax and other credit carryforwards 6,198 5,612
Lease liability 307 416
Capitalized research and development 2,170 1,764
Other 274 337
Gross deferred tax assets 55,806 54,299
Valuation allowance (54,597) (54,105)
Net deferred tax assets 1,209 194
Deferred tax liabilities:    
Fixed assets (295)  
Intangible assets-excess of tax over financial statement amortization (1,433)  
Right-of-use lease asset   (404)
Other (60) (39)
Net deferred tax liabilities $ (579) $ (249)