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Business Combinations (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jul. 27, 2015
Jul. 24, 2015
Jan. 02, 2016
Oct. 03, 2015
Business Acquisition [Line Items]        
Goodwill, Period Increase (Decrease)     $ 400  
Goodwill     $ 100,175 $ 101,817
Business Combination, Bargain Purchase, Gain Recognized, Amount       1,300
Tinsley [Member]        
Business Acquisition [Line Items]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory $ 2,263      
Business Combination, Acquired Receivables, Gross Contractual Amount 2,240      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets 1,132      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 2,451      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities (1,702)      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent (768)      
Payments to Acquire Businesses, Gross 4,300      
Business Combination, Acquisition Related Costs       400
Business Combination, Bargain Purchase, Gain Recognized, Amount $ (1,316)      
Raydianceinc [Member]        
Business Acquisition [Line Items]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets   $ 1,048    
Goodwill   1,552    
Payments to Acquire Businesses, Gross   5,000    
Business Combination, Acquisition Related Costs       $ 100
Minimum [Member] | Raydianceinc [Member]        
Business Acquisition [Line Items]        
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life       3 years
Maximum [Member] | Raydianceinc [Member]        
Business Acquisition [Line Items]        
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life       5 years
Existing technology [Member] | Raydianceinc [Member]        
Business Acquisition [Line Items]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles   800    
Customer Lists [Member] | Raydianceinc [Member]        
Business Acquisition [Line Items]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles   $ 1,600