Note 6 - Goodwill and Intangibles - Changes in customer list intangible (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Balance at the beginning of period	$ 14,970	$ 17,450
Intangibles amortization	2,149	2,266	$ 1,692
Balance at the end of the period	11,381	14,970	17,450
Customer Lists [Member]
Balance at the beginning of period	1,504	1,855
Intangibles amortization	(64)	(137)
Balance at the end of the period		1,504	$ 1,855
Bates Companies | Customer Lists [Member]
Acquisition of Bates Companies - measurement period adjustment		$ (214)
Bates Companies | Customer Lists [Member]
Sale of Bates Companies	$ (1,440)