Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Domestic Valuation Allowance Release of Valuation Allowance Due to Profitability [Member]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount			$ (26,902)
Domestic Valuation Allowance Change for Income Loss [Member]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount			142
Foreign Valuation Allowance Change for Income Loss [Member]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		$ 684	217	$ (94)
Domestic Valuation Allowance [Member]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		(381)	(26,760)	(3)
Foreign Valuation Allowance [Member]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		(1,531)	1,923	(48)
Foreign Gains and Losses Related to Deferred Taxes and Currency Translation Adjustments Included in OCI [Member]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		$ (2,215)	$ 1,706	$ 46
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Earliest Tax Year [Member]
Open Tax Year		2012
Foreign Tax Authority [Member] | Earliest Tax Year [Member]
Open Tax Year		2009
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Open Tax Year		2011
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		$ 303	$ (26,543)	$ (97)
Operating Loss Carryforward Foreign		12,716
Acquired Operating Loss Carryforwards		1,322
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	$ 19,925	3,990	19,925
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	2,773	1,306	2,773
Foreign Earnings Repatriated		9,850	5,442
Deferred Tax Liabilities, Undistributed Foreign Earnings	726	208	726
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		1,492
Unrecognized Tax Benefits, Income Tax, Gross Penalties and Interest Disclosed	489	475	489	5,005
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense		58	$ 337	$ 219
Amount of Tax and Intrest Paid as Final Settlement to the Tax Authority	1,487
Unrecognized Tax Benefits, Period Increase (Decrease)	$ 4,137
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit		$ 500