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Subsequent Events (Details) - USD ($)
$ in Thousands
6 Months Ended
Jul. 01, 2019
Jun. 30, 2019
Jul. 01, 2018
Subsequent Event [Line Items]      
Repayment of line of credit   $ 20,000 $ 12,000
Subsequent Event      
Subsequent Event [Line Items]      
Repayment of line of credit $ 12,000    
Interest rate 6.00%