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Fair Value Measurements Of Assets And Liabilities (Details) - USD ($)
$ / shares in Units, $ in Thousands
Dec. 30, 2016
Jul. 01, 2016
Level 1 | Money market funds    
Cash equivalents:    
Money market, net asset value (usd per share) $ 1.00 $ 1.00
Recurring | Level 1 | Cost | Money market funds    
Cash equivalents:    
Cash equivalents $ 18,129 $ 18,800
Recurring | Level 1 | Fair Value | Money market funds    
Cash equivalents:    
Cash equivalents 18,129 18,800
Recurring | Level 2 | Cost    
Cash equivalents:    
Short term investments 228 222
Other current assets 193 5
Other accrued expenses 309 9
Recurring | Level 2 | Cost | Bank certificates of deposit    
Cash equivalents:    
Cash equivalents 11 11
Recurring | Level 2 | Fair Value    
Cash equivalents:    
Short term investments 228 222
Other current assets 193 5
Other accrued expenses 309 9
Recurring | Level 2 | Fair Value | Bank certificates of deposit    
Cash equivalents:    
Cash equivalents $ 11 $ 11