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Fair Value Measurements of Assets and Liabilities (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 27, 2019	Jun. 28, 2019
Level 1 | Money market funds
Liabilities:
Money market, net asset value (in dollars per share)	$ 1.00	$ 1.00
Recurring | Level 1 | Carrying Amount | Money market funds
Assets:
Cash equivalents	$ 17,562	$ 15,121
Recurring | Level 1 | Fair Value | Money market funds
Assets:
Cash equivalents	17,562	15,121
Recurring | Level 2 | Carrying Amount | Foreign exchange forward contracts
Assets:
Foreign exchange forward contracts	2	0
Liabilities:
Foreign exchange forward contracts	107	7
Recurring | Level 2 | Carrying Amount | Bank certificates of deposit
Assets:
Cash equivalents	1,983	1,989
Recurring | Level 2 | Fair Value | Foreign exchange forward contracts
Assets:
Foreign exchange forward contracts	2	0
Liabilities:
Foreign exchange forward contracts	107	7
Recurring | Level 2 | Fair Value | Bank certificates of deposit
Assets:
Cash equivalents	$ 1,983	$ 1,989

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