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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Deferred tax assets [Abstract]    
Accrued expenses $ 249 $ 269
Share based compensation 94 99
Net operating loss carryforwards 15,412 13,397
Income tax credit carryforwards 1,725 1,630
Property and equipment, net 218 154
Intangible assets 730 685
Capitalized R&D 3,949 2,842
Other, net 213 453
Total deferred tax assets 22,590 19,529
Valuation allowance (22,575) (19,486)
Total deferred tax assets, net of allowance 15 43
Deferred tax liabilities [Abstract]    
Other (15) (43)
Total deferred tax liability (15) (43)
Net deferred tax assets (liability) $ 0 $ 0