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Organization and Summary of Significant Accounting Policies - Changes in Warranty Reserve (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 28, 2020
Jun. 30, 2019
Changes in warranty reserve    
Balance, Beginning of Year $ 7,900 $ 7,800
Provision Charged to Expense 823 559
Payments 223 459
Balance, End of Year $ 8,500 $ 7,900