Note 6 - Segment and Geographic Information - Long Lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Long lived assets by region	$ 116,678	$ 115,033
UNITED STATES
Long lived assets by region	52,270	50,242
CHINA
Long lived assets by region	45,339	45,728
BERMUDA
Long lived assets by region	9,060	9,573
TAIWAN, PROVINCE OF CHINA
Long lived assets by region	9,576	8,919
Other Region [Member]
Long lived assets by region	$ 433	$ 571