Note 12 - Income Taxes (Details) - Reconciliation of Income Tax Computed at the U.S. Federal Statutory Rate - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Income Tax Computed at the U.S. Federal Statutory Rate [Abstract]
Expected tax expense (benefit)	$ 2,869	$ 5,225	$ (5,450)
Increase (decrease) in income taxes resulting from:
State income taxes, net of federal benefit	464	712	(694)
Non-deductible items	981	896	240
Impact of foreign jurisdictions	(1,751)	(2,587)	433
Other	41	189	115
Income tax expense (benefit)	$ 2,604	$ 4,435	$ (5,356)