Note 3 - Income Taxes (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2018			2017			2018			2017
Income (loss) before Income Taxes	$	18,137		$	(1,668	)	$	19,956		$	(20,667	)
Income tax provision (benefit)		1,679			(1,008	)		1,081			(7,203	)
Effective tax rate		9.3	%		60.4	%		5.4	%		34.9	%

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Three Months ended September 30, 2018			Nine Months ended September 30, 2018
Tax-deductible IPO costs		(65	)		(546	)
Share based compensation tax deduction in excess of book expense		18			(723	)
Reductions to unrecognized tax benefits and related interest		(3,344	)		(3,344	)
Transition tax estimate update		716			716

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

	September 30, 2018			December 31, 2017
Beginning balance	$	5,506		$	5,200
Additions based on tax positions taken in prior years		-			306
Reductions as a result of a lapse of the applicable statute of limitations		(2,753	)		-
Reductions as a result of tax positions taken during prior periods		(93	)		-
Ending balance	$	2,660		$	5,506