Note 11 - INCOME TAXES - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carry forward	$ 13,149	$ 8,085
Research and development and other credit carry forward	26,591	24,723
Foreign tax credit carry forward	11,010	9,435
Accruals deductible in different periods	3,362	3,471
Leases	1,472	1,669
Stock-based compensation	1,442	1,220
Total deferred tax assets	57,026	48,603
Less: valuation allowance	(51,586)	(41,859)
Deferred tax assets, net of valuation allowance	5,440	6,744
Deferred tax liabilities
Property and equipment, net	178	(629)
Operating lease right-of-use assets	(1,472)	(1,669)
Intangible assets	(4,129)	(4,218)
Deferred tax liabilities	(5,423)	(6,516)
Net deferred tax assets	$ 17	$ 228