Commitments and Contingencies - Narrative (Details) - USD ($)	3 Months Ended
	Apr. 03, 2016	Mar. 29, 2015	Jan. 03, 2016
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Total rent expense, net of sublease income	$ 198,000	$ 239,000
Royalty Claims
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Minimum loss	25,000
Maximum loss	250,000
Wafer and Finished Goods Inventory
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Outstanding commitment for purchases	129,000		$ 1,400,000
Other Goods and Services
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Total outstanding purchase obligations	1,500,000
Purchase obligations due within the next twelve months	$ 1,400,000