Note 1 - Summary of Significant Accounting Policies - Net Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net sales	$ 115,168	$ 104,106
Medical [Member]
Net sales	63,047	55,098
Aerospace and Defense [Member]
Net sales	16,639	20,624
Industrial [Member]
Net sales	$ 35,482	$ 28,384