Note 3 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net sales	$ 32,518	$ 30,182	$ 63,229	$ 52,254
Medical [Member]
Net sales	18,538	16,070	33,804	28,411
Industrial [Member]
Net sales	9,454	10,176	18,121	16,395
Aerospace and Defense [Member]
Net sales	4,526	3,936	11,304	7,448
Transferred over Time [Member]
Net sales	24,084	24,801	46,477	41,454
Transferred over Time [Member] | Medical [Member]
Net sales	13,165	12,776	22,972	21,735
Transferred over Time [Member] | Industrial [Member]
Net sales	6,930	8,287	13,459	12,917
Transferred over Time [Member] | Aerospace and Defense [Member]
Net sales	3,989	3,738	10,046	6,802
Transferred at Point in Time [Member]
Net sales	7,295	4,910	14,426	9,401
Transferred at Point in Time [Member] | Medical [Member]
Net sales	4,763	3,050	9,678	5,942
Transferred at Point in Time [Member] | Industrial [Member]
Net sales	2,196	1,738	3,987	3,075
Transferred at Point in Time [Member] | Aerospace and Defense [Member]
Net sales	336	122	761	384
Noncash Consideration [Member]
Net sales	1,139	471	2,326	1,399
Noncash Consideration [Member] | Medical [Member]
Net sales	610	244	1,154	734
Noncash Consideration [Member] | Industrial [Member]
Net sales	328	151	675	403
Noncash Consideration [Member] | Aerospace and Defense [Member]
Net sales	$ 201	$ 76	$ 497	$ 262