Note 7. Concentration of Credit Risk (Details)
12 Months Ended
Dec. 29, 2013
Dec. 30, 2012
Dec. 25, 2011
Two Customers [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
     
Note 7. Concentration of Credit Risk (Details) [Line Items]      
Concentration Risk, Percentage 39.00%    
One Customer [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]
     
Note 7. Concentration of Credit Risk (Details) [Line Items]      
Concentration Risk, Percentage   25.00%  
Fujitsu Semiconductor Limited [Member] | Distributor Concentration Risk [Member] | Sales Revenue, Goods, Net [Member]
     
Note 7. Concentration of Credit Risk (Details) [Line Items]      
Concentration Risk, Percentage 39.00% 33.00% 29.00%