Note 3 - Acquisitions - Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Redemption value adjustment	$ (909)
Redeemable Noncontrolling Interest [Member]
Beginning Balance - January 1
Noncontrolling interest of Pramac	34,253
Net income	100
Foreign currency translation	(2,124)
Redemption value adjustment	909
Ending Balance - December 31	$ 33,138