XML 74 R62.htm IDEA: XBRL DOCUMENT v3.10.0.1
Segment, Geographic, Product and Significant Customer Information - Revenue Net (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Net revenues:        
Total net revenues $ 88,604 $ 64,427 $ 170,917 $ 123,741
South Korea [Member]        
Net revenues:        
Total net revenues 30,980 31,500 68,798 50,119
Japan [Member]        
Net revenues:        
Total net revenues 15,017 9,267 28,396 12,620
United States [Member]        
Net revenues:        
Total net revenues 7,392 8,297 14,130 21,870
China [Member]        
Net revenues:        
Total net revenues 28,333 7,330 36,375 14,017
Taiwan [Member]        
Net revenues:        
Total net revenues 1,974 4,878 3,034 16,711
Singapore [Member]        
Net revenues:        
Total net revenues 2,380 963 14,535 2,454
Other [Member]        
Net revenues:        
Total net revenues $ 2,528 $ 2,192 $ 5,649 $ 5,950