Income Taxes - Deferred Tax Valuation Allowance Activities (Details) - Valuation Allowance of Deferred Tax Assets [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 30, 2019
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ (37,439)	$ (26,020)	$ (15,143)
Decrease (increase) in valuation allowance	459	(11,419)	(10,877)
Balance at end of period	$ (36,980)	$ (37,439)	$ (26,020)