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Balance Sheet Components (Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($)
$ in Thousands
Sep. 27, 2019
Jun. 28, 2019
Sep. 28, 2018
Jun. 29, 2018
Balance Sheet Related Disclosures [Abstract]        
Cash and cash equivalents $ 34,485 $ 31,946    
Restricted cash included in other assets 255 255    
Total cash, cash equivalents, and restricted cash in the Statement of Cash Flows $ 34,740 $ 32,201 $ 28,706 $ 37,764