Note 2 - Acquisitions - Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Redemption value adjustment	$ 614
Redeemable Noncontrolling Interest [Member]
Balance at beginning of period	33,138
Noncontrolling interest of Pramac		34,253
Net income	118	16
Foreign currency translation	924	778
Redemption value adjustment	(614)
Balance at end of period	$ 33,566	$ 35,047