Note 9 - Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Operating loss carryforwards	$ 0	$ 1,857
R&D Tax Credits	300	2,779
Section 263A costs	47	56
Additional K-1 temporary adjustment	1	0
Capitalized research and development expenses	3,389	1,029
Interest	0	34
Net ROU asset and lease liability	42	53
Unrealized loss	0	628
Capital loss carryforward	802	0
Bad debts	13	12
Inventory allowance	454	430
State depreciation	117	0
Non-qualified stock options	463	343
Compensation	122	107
Deferred warranty revenue	2,638	1,934
Deferred tax assets	8,388	9,262
Less valuation allowance	(802)	(4,398)
Total deferred tax assets	7,586	4,864
Depreciation	(798)	(748)
Total deferred tax liabilities	(798)	(748)
Net deferred tax assets	$ 6,788	$ 4,116