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Acquisitions (Narrative) (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 27, 2019
EUR (€)
Mar. 27, 2019
USD ($)
Mar. 28, 2018
EUR (€)
Mar. 28, 2018
USD ($)
Dec. 04, 2017
USD ($)
shares
Aug. 31, 2017
EUR (€)
Aug. 31, 2017
USD ($)
Feb. 23, 2019
EUR (€)
shares
Feb. 23, 2019
USD ($)
Nov. 24, 2018
EUR (€)
Nov. 24, 2018
USD ($)
Feb. 23, 2019
EUR (€)
shares
Feb. 23, 2019
USD ($)
May 26, 2018
entity
Feb. 23, 2019
USD ($)
shares
Business Acquisition [Line Items]                              
Number of businesses acquired | entity                           2  
Contingent consideration adjustment                         $ (374,000)    
Contingent Consideration Due For Calendar Year 2018 [Member] | Subsequent Event [Member]                              
Business Acquisition [Line Items]                              
Contingent consideration paid € 1,600,000 $ 1,900,000                          
Taskforce [Member]                              
Business Acquisition [Line Items]                              
Consideration paid           € 5,800,000 $ 6,900,000                
Discount rate                             0.110
Contingent consideration adjustment               € (302,000) $ (343,000)     € (332,000) $ (376,000)    
Taskforce [Member] | Contingent Consideration Due For Calendar Year 2017 [Member]                              
Business Acquisition [Line Items]                              
Contingent consideration, factor by which EBITDA is multiplied to calculate consideration payable               610.00%       610.00%     610.00%
Contingent consideration, percentage payable to employees of the acquired business               20.00%       20.00%     20.00%
Contingent consideration paid     € 2,100,000 $ 2,600,000                      
Taskforce [Member] | Contingent Consideration Due For Calendar Years 2018 And 2019 [Member]                              
Business Acquisition [Line Items]                              
Contingent consideration, factor by which EBITDA is multiplied to calculate consideration payable               610.00%       610.00%     610.00%
Contingent consideration, percentage payable to employees of the acquired business               15.00%       15.00%     15.00%
Contingent consideration liability               € 2,100,000       € 2,100,000     $ 2,400,000
Accretive [Member]                              
Business Acquisition [Line Items]                              
Contingent consideration liability                             $ 100,000
Contingent consideration, shares | shares               108,000       108,000     108,000
Acquisition of business, cash paid         $ 20,000,000                    
Acquisition of business, shares issued | shares         1,072,000                    
Acquisition of business, shares issued, sale restriction period                       4 years 4 years    
Scenario, Adjustment [Member] | Taskforce [Member]                              
Business Acquisition [Line Items]                              
Contingent consideration adjustment                   € 100,000 $ 200,000