Note 17 - Segment and Geographic Information - Long Lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Long lived assets by region	$ 180,238	$ 115,033	$ 93,324
CHINA
Long lived assets by region	89,472	45,728	40,738
UNITED STATES
Long lived assets by region	65,618	50,242	40,405
TAIWAN, PROVINCE OF CHINA
Long lived assets by region	17,238	8,919	126
BERMUDA
Long lived assets by region	7,522	9,573	11,624
Other Region [Member]
Long lived assets by region	$ 388	$ 571	$ 431