Note 16 - Segment and Geographic Information - Long Lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Long lived assets by region	$ 228,315	$ 150,001	$ 144,636
CHINA
Long lived assets by region	113,888	93,096	89,472
UNITED STATES
Long lived assets by region	94,671	39,054	37,539
TAIWAN, PROVINCE OF CHINA
Long lived assets by region	17,652	16,972	17,238
Other Region [Member]
Long lived assets by region	$ 2,104	$ 879	$ 387