Note 6 - Segment and Geographic Information - Long Lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Long lived assets by region	$ 132,259	$ 115,033
UNITED STATES
Long lived assets by region	59,749	50,242
CHINA
Long lived assets by region	46,598	45,728
TAIWAN, PROVINCE OF CHINA
Long lived assets by region	16,940	8,919
BERMUDA
Long lived assets by region	8,548	9,573
Other Region [Member]
Long lived assets by region	$ 424	$ 571