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Risks and Uncertainties (Details)
$ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
item
Jan. 02, 2016
Jan. 03, 2015
Risks and uncertainties      
Carrying value of cost method investment $ 2.8    
Number of Notes Receivable | item 2    
Interest rate on unsettled balances due upon demand (as a percent) 0.00%    
First notes receivable      
Risks and uncertainties      
Notes receivable principal amount $ 1.5    
Second notes receivable      
Risks and uncertainties      
Notes receivable principal amount $ 0.7    
Accounts receivable | Customers | Edom Technology      
Risks and uncertainties      
Concentrations of credit risk (as a percent) 19.00% 17.00%  
Accounts receivable | Customers | Avnet      
Risks and uncertainties      
Concentrations of credit risk (as a percent) 12.00% 14.00%  
Accounts receivable | Customers | Arrow Electronics      
Risks and uncertainties      
Concentrations of credit risk (as a percent) 13.00% 17.00%  
Revenue | Edom Technology      
Risks and uncertainties      
Concentrations of credit risk (as a percent) 17.00% 20.00% 20.00%
Revenue | Avnet      
Risks and uncertainties      
Concentrations of credit risk (as a percent) 13.00% 12.00% 12.00%
Revenue | Arrow Electronics      
Risks and uncertainties      
Concentrations of credit risk (as a percent) 11.00%    
Revenue | Arrow Electronics | 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)     12.00%
Revenue | Customers | Samsung | High end of range      
Risks and uncertainties      
Concentrations of credit risk (as a percent) 10.00% 10.00%