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Stockholders' Equity (Stock Based Compensation Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 29, 2017
Dec. 30, 2016
Dec. 29, 2017
Dec. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 580 $ 488 $ 1,154 $ 946
Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 34 43 68 189
Restricted stock units and performance stock units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 546 445 1,086 757
Cost of revenues        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 55 62 99 102
Research and development        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 39 38 78 62
Selling and administrative        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 486 $ 388 $ 977 $ 782