Risks and Uncertainties (Details)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Accounts receivable | Customers | Edom Technology
Risks and uncertainties
Concentrations of credit risk (as a percent)	23.00%	29.00%
Accounts receivable | Customers | Avnet
Risks and uncertainties
Concentrations of credit risk (as a percent)	12.00%	13.00%
Revenue | Edom Technology
Risks and uncertainties
Concentrations of credit risk (as a percent)	22.00%	24.00%	28.00%
Revenue | Avnet
Risks and uncertainties
Concentrations of credit risk (as a percent)	11.00%	12.00%	14.00%
Revenue | Macnica
Risks and uncertainties
Concentrations of credit risk (as a percent)		10.00%
Revenue | Macnica | High end of range
Risks and uncertainties
Concentrations of credit risk (as a percent)	10.00%		10.00%
Revenue | Customers | Samsung
Risks and uncertainties
Concentrations of credit risk (as a percent)	19.00%	13.00%
Revenue | Customers | Samsung | High end of range
Risks and uncertainties
Concentrations of credit risk (as a percent)			10.00%