Lease Obligations and Other Commitments - Schedule of Cash Outflows of Leasing Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 28, 2020	Nov. 30, 2019	Nov. 28, 2020	Nov. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Operating cash flows from operating leases			$ 549
Operating cash flows from financing leases			84
Finance cash flows from financing leases	$ 46	$ 45	$ 91	$ 75