Severance liabilities - Schedule of Changes in Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	Jun. 24, 2022	Jun. 25, 2021	Jun. 26, 2020
Defined Benefit Plan Disclosure [Line Items]
Total Assets	$ 338	$ 356	$ 294
Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Assets	208	211
Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Assets	130	145
Defined Benefit Plan Other
Defined Benefit Plan Disclosure [Line Items]
Total Assets	338	356
Defined Benefit Plan Other | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Assets	208	211
Defined Benefit Plan Other | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Assets	$ 130	$ 145