Annual report pursuant to Section 13 and 15(d)

Acquisitions (Details Textual)

v3.3.1.900
Acquisitions (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Oct. 18, 2012
Mar. 29, 2014
Jan. 02, 2016
Dec. 27, 2014
Dec. 28, 2013
Apr. 01, 2013
Mar. 30, 2013
Business Acquisition [Line Items]              
Percentage of Common Stock Purchased           60.00%  
Transaction cost arising from acquisition           $ 1,000  
Goodwill     $ 4,988 $ 5,141 $ 5,221    
Gross carrying amount     5,971 4,479      
Gain on purchase of business     0 0 $ 528    
Equity method investment, ownership percentage             40.00%
Series of Individually Immaterial Business Acquisitions [Member]              
Business Acquisition [Line Items]              
Transaction cost arising from acquisition $ 1,458            
Goodwill $ 1,731         726  
Gross carrying amount           746  
Acquisition-related costs (included in Selling, engineering, and administrative expenses)   $ 12          
Gain on purchase of business   $ 528          
Percentage of sale of component supplier 80.00%            
Seungwon Solutions Corporation [Member]              
Business Acquisition [Line Items]              
Transaction cost arising from acquisition $ 80            
Trade Name [Member]              
Business Acquisition [Line Items]              
Gross carrying amount     774 774      
Finite-lived intangible assets, estimated useful life   1 year          
Trade Name [Member] | Series of Individually Immaterial Business Acquisitions [Member]              
Business Acquisition [Line Items]              
Trade name           18  
Noncompete Agreements [Member]              
Business Acquisition [Line Items]              
Gross carrying amount     11 11      
Finite-lived intangible assets, estimated useful life   2 years          
Noncompete Agreements [Member] | Series of Individually Immaterial Business Acquisitions [Member]              
Business Acquisition [Line Items]              
Non-compete agreements           11  
Customer Relationships [Member]              
Business Acquisition [Line Items]              
Gross carrying amount     $ 1,751 $ 1,751      
Customer Relationships [Member] | Series of Individually Immaterial Business Acquisitions [Member]              
Business Acquisition [Line Items]              
Finite-lived intangible assets, estimated useful life   15 years          
Customer relationships           276  
Developed Technology Rights [Member] | Series of Individually Immaterial Business Acquisitions [Member]              
Business Acquisition [Line Items]              
Finite-lived intangible assets, estimated useful life   10 years          
Acquired definite lived intangible assets           $ 441