Note 17 - Segment and Geographic Information - Long Lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Long lived assets by region	$ 188,653	$ 180,238	$ 115,033
CHINA
Long lived assets by region	93,096	89,472	45,728
UNITED STATES
Long lived assets by region	71,025	65,618	50,242
TAIWAN, PROVINCE OF CHINA
Long lived assets by region	16,972	17,238	8,919
BERMUDA
Long lived assets by region	6,682	7,522	9,573
Other Region [Member]
Long lived assets by region	$ 878	$ 388	$ 571