Income taxes - Schedule of Changes in Valuation Allowances of Deferred Tax Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 24, 2022	Jun. 25, 2021
Reconciliation Of Nol Deferred Tax Assets Valuation Allowance [Roll Forward]
Beginning Balance	$ 4,934	$ 2,061	$ 3,728
Additional	498	2,873	479
Reduction	(1,608)		(2,146)
Ending Balance	$ 3,824	$ 4,934	$ 2,061