Note 17 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	35.00%
Tax Adjustments, Settlements, and Unusual Provisions	$ 900
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	600
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	200
Unrecognized Tax Benefits, Income Tax Penalties Accrued	0	$ 0	$ 0
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	45,400	45,400
Operating Loss Carryforwards, Expired Between 2035 and 2036	36,300	36,300
Operating Loss Carryforwards, Indefinite lived	9,100	9,100
Tax Credit Carryforward, Amount	2,900	2,900
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	56,700	56,700
Tax Credit Carryforward, Amount	4,200	4,200
Foreign Tax Authority [Member]
Operating Loss Carryforwards, Total	$ 1,600	$ 1,600