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Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	May 30, 2021	May 31, 2020	May 26, 2019
Income Tax Disclosure [Abstract]
Tax at U.S. statutory rate	$ (8,498)	$ (10,774)	$ 764
State income taxes, net of federal benefit	(1,136)	(1,782)	46
Tax reform/CARES Act	0	(2,770)	0
Change in valuation allowance	3,690	2,654	929
Tax credit carryforwards	(606)	(613)	(771)
Other compensation-related activity	249	334	618
Impairment of goodwill	0	647	0
Foreign rate differential	(1,414)	(863)	0
Other	(86)	51	(68)
Income tax (benefit) expense	$ (7,801)	$ (13,116)	$ 1,518

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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