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Business Combinations - Additional Information (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 05, 2019
USD ($)
Apr. 16, 2019
USD ($)
Apr. 16, 2019
EUR (€)
Jun. 28, 2019
USD ($)
Jun. 29, 2018
USD ($)
Jun. 28, 2019
USD ($)
Jun. 29, 2018
USD ($)
Apr. 16, 2019
EUR (€)
Dec. 31, 2018
USD ($)
Business Acquisition [Line Items]                  
Goodwill       $ 230,371   $ 230,371     $ 217,662
Acquisition costs       2,179 $ 1,451 2,997 $ 1,476    
Revolving Credit Facility                  
Business Acquisition [Line Items]                  
Amount draw-down to finance acquisition           23,600      
Med X Change, Inc                  
Business Acquisition [Line Items]                  
Percentage of shares acquired 100.00%                
Cash consideration $ 21,800                
Med X Change, Inc | Revolving Credit Facility                  
Business Acquisition [Line Items]                  
Amount draw-down to finance acquisition $ 21,000                
Ingenia-CAT, S.L.                  
Business Acquisition [Line Items]                  
Percentage of shares acquired   100.00%           100.00%  
Cash consideration   $ 9,600 € 8,500,000            
Purchase price   16,200           € 14,300,000  
Fair value of contingent consideration   6,600           5,800,000  
Undiscounted low range of contingent consideration | €               0  
Undiscounted high range of contingent consideration | €               8,000,000.0  
Purchase price heldback   $ 1,000           € 900,000  
Expiration period   2021-10 2021-10            
Med X Change, Inc and Ingenia-CAT, S.L.                  
Business Acquisition [Line Items]                  
Fair value of contingent consideration       6,569   6,569      
Purchase price heldback       961   961      
Intangible Assets Estimated Fair Value       22,376   22,376      
Goodwill       13,394   13,394      
Goodwill assets expected to be deductible for tax purposes       $ 6,000   6,000      
Revenues           1,000      
Income (loss) before income taxes           (500)      
Amortization of inventory fair value adjustments and purchased intangible assets           400      
Acquisition costs           $ 500