Note 6 - Domestic and Foreign Income Taxes - Schedule of Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carry forwards	$ 8,605	$ 8,486
Inventory	570	548
Compensation accruals	1,310	1,161
Accruals and reserves	95	92
Credits	235	235
Contract assets	1,989	1,573
Other	118	134
Total Deferred tax assets	12,922	12,229
Less: valuation allowance	(12,013)	(11,395)
Deferred tax assets net of valuation allowance	909	834
Deferred tax liabilities
Depreciation and amortization	(909)	(844)
Identified intangibles	(873)	(1,008)
Total deferred tax liabilities	(1,782)	(1,852)
Net deferred tax	$ (873)	$ (1,018)