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Acquisition (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Apr. 03, 2015
Mar. 28, 2014
Jan. 01, 2016
Jan. 02, 2015
Business Acquisition [Line Items]        
Purchase price, cash       $ 2,877
Bargain purchase gain $ 3,000     3,015
Technolab International Corporation [Member]        
Business Acquisition [Line Items]        
Purchase price   $ 3,000    
Purchase price, common stock   1,000    
Contingent consideration   8,000    
Bargain purchase gain   3,015    
Acquired intangible assets   $ 7,700    
Contributed total revenue       10,300
Contribution before depreciation, amortization, interest, corporate overhead allocation and taxes       $ 3,300
Minimum [Member] | Technolab International Corporation [Member]        
Business Acquisition [Line Items]        
Amortization period     2 years  
Maximum [Member] | Technolab International Corporation [Member]        
Business Acquisition [Line Items]        
Amortization period     5 years