Note 6 - Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings from continuing operations, before income tax expense	$ 17,845	$ 32,690	$ 39,962
Expected federal income taxes	3,747	6,865	8,392
US federal statutory income tax rate	$ 3,747	6,865	8,392
US federal statutory income tax rate	21.00%
Foreign tax rate differential		(2)	(4)
Nontaxable and Nondeductible Items	$ 33	113	92
Nontaxable and Nondeductible Items	0.19%
State income taxes, net of federal benefit and state tax credits	$ 1,130	1,324	1,323
Sec 162(m) Limit	$ 1,384
Sec 162(m) Limit	7.76%
Share-based compensation		(167)	(334)
Tax credits	$ (227)	(401)	(569)
Tax credits	(1.27%)
Federal tax credits	$ (227)	(401)	(569)
Return to provision adjustment	$ 4
Return to provision adjustment	0.02%
Uncertain tax positions		171	73
State taxes	$ 1,130	1,324	1,323
State taxes	6.33%
Non-deductible expenses	$ 33	113	92
Worldwide changes in unrecognized tax benefits	$ 174
Worldwide changes in unrecognized tax benefits	0.97%
Other		4	18
Total tax expense	$ 6,245	$ 7,907	$ 8,991
Total	35.00%