Note 12 - Income Taxes (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2015
Effective Income Tax Rate Reconciliation, Percent, Total		17.50%	(118.60%)
Income Tax Settlement Amount with Taxing Authority					$ 3,700	$ 7,400
Payments for Income Tax Settlement with Taxing Authority	$ 5,400	$ 700
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority				$ (500)
Income Tax Examination, Penalties Accrued		900
Deferred Tax Assets, Valuation Allowance, Total		39,161	$ 40,830
Deferred Tax Assets, Operating Loss Carryforwards, Domestic		18,643	44,485
Deferred Tax Assets, Capital Loss Carryforwards		600
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		500	400
Capital Loss Carryforward [Member]
Tax Credit Carryforward, Amount		2,800
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total		85,600
Income Tax Expense (Benefit) [Member]
Income Tax Examination, Penalties and Interest Expense, Total		$ 100
Income Tax Examination, Penalties and Interest Expense, Net Reversal			$ 1,200