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Equity (Stock Based Compensation Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 29, 2019
Mar. 30, 2018
Mar. 29, 2019
Mar. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 458 $ 535 $ 1,396 $ 1,689
Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 116 36 271 104
Restricted and performance stock awards and units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 342 499 1,125 1,585
Cost of revenues        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 44 53 144 152
Research and development        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 42 36 123 114
Selling and administrative        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 372 $ 446 $ 1,129 $ 1,423