Geographic and Significant Customer Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014 segment	Jun. 29, 2013
Segment Reporting [Abstract]
Number of operating segments			1
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenues	$ 48,029	$ 34,552	$ 99,605	$ 59,104
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenues	13,302	16,328	20,043	25,761
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenues	2,222	5,407	5,906	6,051
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenues	6,281	2,018	10,697	7,230
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenues	9,358	5,594	24,846	9,141
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenues	8,373	506	24,262	761
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenues	$ 8,493	$ 4,699	$ 13,851	$ 10,160