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Note 4 - Supplemental Balance Sheet Information - Composition of Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Cost $ 28,454 $ 19,662
Accumulated Amortization 11,064 10,453
Net 17,390 9,209
Customer Relationships [Member]    
Cost 13,214 9,171
Accumulated Amortization 5,484 5,115
Net 7,730 4,056
Patented Technology [Member]    
Cost 5,667 5,557
Accumulated Amortization 5,126 5,014
Net 541 543
Trade Names [Member]    
Cost 4,670 1,524
Accumulated Amortization 436 324
Net 4,234 1,200
Trademarks [Member]    
Cost 3,413 3,410
Accumulated Amortization 0 0
Net 3,413 $ 3,410
Other Intangible Assets [Member]    
Cost 1,490  
Accumulated Amortization 18  
Net $ 1,472