Note 7 - Income Taxes - Reconciliation of Gross Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Unrecognized tax benefits balance	$ 9,174
Gross increases for tax positions taken in prior years	135
Gross decreases for tax positions taken in prior years	(565)
Other	469
Unrecognized tax benefits balance	9,213	$ 9,174
Predecessor [Member]
Unrecognized tax benefits balance	$ 9,174	10,899
Gross increases for tax positions taken in prior years		240
Gross decreases for tax positions taken in prior years		(152)
Other		(1,813)
Unrecognized tax benefits balance		$ 9,174