Lease Obligations and Other Commitments - Schedule of Gross Amount Assets and Liabilities Related to Operating and Financing Leases (Details) - USD ($) $ in Thousands	Feb. 27, 2021	May 30, 2020
Lease Type
Operating lease ROU asset	$ 2,640	$ 3,018
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Total Lease ROU asset	Total Lease ROU asset
Financing lease ROU asset	$ 331	$ 401
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Total Lease ROU asset	Total Lease ROU asset
Total Lease ROU asset	$ 2,971	$ 3,419
Operating lease liability current	$ 1,078	$ 1,329
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Total lease liability current	Total lease liability current
Financing lease liability current	$ 161	$ 156
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Total lease liability current	Total lease liability current
Total lease liability current	$ 1,239	$ 1,485
Operating lease liability non-current	$ 1,599	$ 1,778
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Total lease liability non-current	Total lease liability non-current
Financing lease liability non-current	$ 30	$ 163
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Total lease liability non-current	Total lease liability non-current
Total lease liability non-current	$ 1,629	$ 1,941