Note 4 - Goodwill and Intangible Assets - Summary of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill		$ 3,905	$ 8,205
Tradenames	1,147	1,147
Total indefinite-lived assets	1,147	5,052
Finite-lived intangible assets, gross	7,522	7,522
Finite-lived intangible assets, accumulated amortization	3,992	2,885
Finite-lived intangible assets, net	3,530	4,637
Customer Relationships [Member]
Finite-lived intangible assets, gross	6,895	6,895
Finite-lived intangible assets, accumulated amortization	3,365	2,380
Finite-lived intangible assets, net	3,530	4,515
Noncompete Agreements [Member]
Finite-lived intangible assets, gross	627	627
Finite-lived intangible assets, accumulated amortization	627	505
Finite-lived intangible assets, net		$ 122