Note 10 - Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Taxes.
Deferred income tax expense	$ 1,817	$ (1,407)	$ 3,046	$ (473)
State income taxes - West Virginia	(229)		(1,615)
Stock-based compensation			219	435
Total income tax expense (benefit)	$ 1,588	$ (1,407)	$ 1,650	$ (38)
Effective Income Tax Rate Reconciliation, Percent, Total	21.00%	23.00%	13.00%	19.00%
Statutory rate			21.00%