Note 3 - Intangible Assets - Summary of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Tradenames	$ 1,147	$ 1,147
Total indefinite-lived assets	1,147	1,147
Finite-lived intangible assets, gross	7,522	7,522
Finite-lived intangible assets, accumulated amortization	4,239	3,992
Finite-lived intangible assets, net	3,283	3,530
Customer Relationships [Member]
Finite-lived intangible assets, gross	6,895	6,895
Finite-lived intangible assets, accumulated amortization	3,612	3,365
Finite-lived intangible assets, net	3,283	3,530
Noncompete Agreements [Member]
Finite-lived intangible assets, gross	627	627
Finite-lived intangible assets, accumulated amortization	627	627
Finite-lived intangible assets, net