Note 7 - Goodwill and Intangible Assets - Change in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill Balance	$ 32,063	$ 43,912
Impairment charge (see Note 8)	0	(8,542)	$ 0
Translation effect	(786)	(3,307)
Goodwill Balance	40,323	$ 32,063	$ 43,912
Acquisition of business (see Note 4)	$ 9,046