Note 6 - Goodwill and Intangible Assets - Summary of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill, gross	$ 62,328	$ 57,969
Goodwill, accumulated impairment	(714)	(714)
Goodwill, net	61,614	57,255	$ 57,935
Finite-lived intangible assets, gross	12,976	12,276
Finite-lived intangible assets, accumulated amortization	12,377	12,057
Finite-lived intangible assets, net	599	219
Total intangible assets other than goodwill	14,167	13,467
Total intangible assets other than goodwill	1,790	1,410
Customer Relationships [Member]
Finite-lived intangible assets, gross	9,445	9,344
Finite-lived intangible assets, accumulated amortization	9,325	9,256
Finite-lived intangible assets, net	$ 120	$ 88
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	5 years	5 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	15 years	15 years
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	7 years	7 years
Finite-lived intangible assets, gross	$ 1,959	$ 1,360
Finite-lived intangible assets, accumulated amortization	1,480	1,229
Finite-lived intangible assets, net	479	131
Trade Names [Member]
Finite-lived intangible assets, gross	1,572	1,572
Finite-lived intangible assets, accumulated amortization	$ 1,572	$ 1,572
Trade Names [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	5 years	5 years
Trade Names [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	10 years	10 years
Trade Names 1 [Member]
Indefinite trade name	$ 1,191	$ 1,191