Note 5 - Supplemental Balance Sheet Information - Composition of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Cost	$ 28,076	$ 28,454
Accumulated Amortization	11,510	11,064
Net	16,566	17,390
Customer Relationships [Member]
Cost	12,978	13,214
Accumulated Amortization	5,689	5,484
Net	7,289	7,730
Patented Technology [Member]
Cost	5,560	5,667
Accumulated Amortization	5,117	5,126
Net	443	541
Trade Names [Member]
Cost	4,631	4,670
Accumulated Amortization	468	436
Net	4,163	4,234
Trademarks [Member]
Cost	3,407	3,413
Accumulated Amortization	0	0
Net	3,407	3,413
Other Intangible Assets [Member]
Cost	1,500	1,490
Accumulated Amortization	236	18
Net	$ 1,264	$ 1,472