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Revenue Recognition (Contracted Balances) (Details) - USD ($)
$ in Thousands
Sep. 27, 2019
Jun. 28, 2019
Jun. 30, 2018
Contract Assets      
Accounts receivable, net $ 43,198 $ 51,937  
Unbilled receivables 30,378 27,780  
Capitalized commissions 933   $ 955
Contract Liabilities      
Advance payments and unearned revenue 18,030 13,962  
Unearned revenue, long-term $ 8,859 $ 9,662