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Income Taxes - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 28, 2020 | Nov. 30, 2019 | Nov. 28, 2020 | Nov. 30, 2019 | May 30, 2020
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Income tax provision | $ 53,000 | $ 80,000 | $ 177,000 | $ 257,000 |
Effective income tax rate |  |  | (63.00%) | (123.60%) |
U.S. statutory tax rate |  |  | 21.00% |  |
Liability for uncertain tax positions related to continuing operations, excluding interest and penalties | 100,000 |  | $ 100,000 |  | $ 100,000
Deferred tax valuation allowance | 12,500,000 |  | 12,500,000 |  | 12,300,000
Maximum |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Deferred tax liability, undistributed earnings of foreign subsidiaries | $ 100,000 |  | $ 100,000 |  | $ 100,000

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