Note 13 - Subsequent Event (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Zenara [Member]
Assets	$ 18,000		$ 18,000
Intangible Assets, Net (Including Goodwill)	13,000		13,000
Property, Plant and Equipment, Net	3,000		3,000
Assets, Current	2,000		2,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	2,000
Assets	509,683		509,683		$ 487,072
Property, Plant and Equipment, Net	180,598		180,598		163,567
Assets, Current	246,002		246,002		$ 227,570
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	$ (1,127)	$ (15,172)	$ (12,732)	$ (14,610)