Risks and Uncertainties (Details)	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Risks and uncertainties
Interest rate on unsettled balances due upon demand (as a percent)	0.00%
Accounts receivable | Customers | Edom Technology
Risks and uncertainties
Concentrations of credit risk (as a percent)	25.00%	26.00%
Accounts receivable | Customers | Arrow Electronics
Risks and uncertainties
Concentrations of credit risk (as a percent)	11.00%	10.00%
Accounts receivable | Customers | Avnet
Risks and uncertainties
Concentrations of credit risk (as a percent)	11.00%
Accounts receivable | Customers | Avnet | High end of range
Risks and uncertainties
Concentrations of credit risk (as a percent)		10.00%
Revenue | Edom Technology
Risks and uncertainties
Concentrations of credit risk (as a percent)	20.00%	21.00%	22.00%
Revenue | Avnet
Risks and uncertainties
Concentrations of credit risk (as a percent)	12.00%	11.00%	11.00%
Revenue | Customers | Samsung
Risks and uncertainties
Concentrations of credit risk (as a percent)	12.00%	15.00%	19.00%