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Acquisitions (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
May 01, 2017
Mar. 29, 2019
Dec. 27, 2019
Business Acquisition [Line Items]      
Purchase consideration     $ 1,010
Jibe Consulting, Inc [Member]      
Business Acquisition [Line Items]      
Effective date of acquisition May 01, 2017    
Purchase consideration $ 5,400    
Purchase consideration, common stock $ 3,600    
Common stock vesting period 4 years    
Contingent consideration performance period 18 months    
Jibe Consulting, Inc [Member] | Selling Shareholder's [Member]      
Business Acquisition [Line Items]      
Cash compensation benefit   $ 1,200  
Jibe Consulting, Inc [Member] | Cash Contingent Consideration [Member]      
Business Acquisition [Line Items]      
Contingent consideration $ 700    
Jibe Consulting, Inc [Member] | Stock Based Contingent Consideration [Member]      
Business Acquisition [Line Items]      
Contingent consideration $ 1,000