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Note 13 - Federal and State Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal									$ (48)	$ (79)	$ (225)
State									189	441	238
Total current income tax provision									141	362	13
Deferred:
Federal									6,185	(24,622)	5,506
State									1,021	(8)	1,152
Total deferred income tax (benefit) provision									7,206	(24,630)	6,658
Total income tax (benefit) expense	$ (1,883)	$ (3,129)	$ (2,005)	$ (330)	$ 28,895	$ (2,169)	$ (1,004)	$ (1,454)	$ 7,347	$ (24,268)	$ 6,671

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Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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