Note 1 - Condensed Consolidated Financial Statements - Segment Reporting (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2026	Mar. 31, 2025
Sales, net		$ 21,293	$ 19,054
Cost of products		10,263	10,104
Gross margin		11,030	8,950
Engineering and product development		3,664	2,537
General and administrative		2,258	1,774
Selling, general and administrative expenses		7,741	6,034
Operating income		3,289	2,916
Income tax (expense)		682	670
Net income (loss)		2,762	2,132
Operating Segments [Member]
Sales, net		21,293	19,054
Cost of products		10,263	10,104
Gross margin		11,030	8,950
Engineering and product development		3,664	2,537
Marketing and selling		1,819	1,723
General and administrative		2,258	1,774
Selling, general and administrative expenses		7,741	6,034
Operating income		3,289	2,916
Other income (expense) (a)	[1]	155	(114)
Income tax (expense)		(682)	(670)
Net income (loss)		$ 2,762	$ 2,132

[1] Other segment items included interest expense and foreign currency exchange gains/(losses)