Note 11 - Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Net operating loss carry-forwards	$ 1,880	$ 2,414
Research and development and other credit carry-forwards	32,657	31,988
Foreign tax credit carry-forwards	2,256	1,977
Capitalized research and experimental expenses	24,932	26,426
Accruals deductible in different periods	8,717	6,049
Leases	952	1,113
Stock-based compensation	2,066	2,087
Total deferred tax assets	73,460	72,054
Less: valuation allowance	(69,874)	(67,946)
Total deferred tax assets, net of valuation allowance	3,586	4,108
Deferred tax liabilities:
Property and equipment, net	(1,233)	(752)
Operating lease right-of-use assets	(922)	(1,082)
Intangible assets	(2,418)	(2,366)
Total deferred tax liabilities	(4,573)	(4,200)
Net deferred tax liabilities	$ (987)	$ (92)