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Balance Sheet Components (Property, Plant and Equipment) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 29, 2019
Mar. 30, 2018
Mar. 29, 2019
Mar. 30, 2018
Jun. 29, 2018
Property, Plant and Equipment [Line Items]          
Property, plant and equipment, gross $ 78,151   $ 78,151   $ 75,881
Less: Accumulated depreciation and amortization (61,302)   (61,302)   (58,702)
Total property, plant and equipment, net 16,849   16,849   17,179
Depreciation and amortization 1,024 $ 1,391 3,408 $ 3,981  
Land          
Property, Plant and Equipment [Line Items]          
Property, plant and equipment, gross 710   710   710
Buildings and leasehold improvements          
Property, Plant and Equipment [Line Items]          
Property, plant and equipment, gross 11,663   11,663   11,597
Software          
Property, Plant and Equipment [Line Items]          
Property, plant and equipment, gross 17,439   17,439   15,498
Machinery and equipment          
Property, Plant and Equipment [Line Items]          
Property, plant and equipment, gross $ 48,339   $ 48,339   $ 48,076