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Income Taxes - Narrative (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Dec. 22, 2017 | May 26, 2019 | May 27, 2018 | May 28, 2017 | May 29, 2016
Tax Credit Carryforward [Line Items] |  |  |  |  |
Statutory rate | 35.00% | 21.00% | 29.40% | 35.00% |
Effective tax rate for the fiscal year |  | 71.00% | (64.00%) | 29.00% |
Excess tax deficits related to stock-based compensation |  | $ 153 | $ 38 |  |
Unrecognized tax benefits |  | 616 | 479 | $ 537 | $ 842
Unrecognized tax benefits that would change the effect tax rate if recognized |  | 500 |  |  |
Decrease in unrecognized tax benefits |  | 32 |  |  |
Deferred tax asset valuation allowance |  | 4,116 | $ 1,337 |  |
Domestic Tax Authority |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 26,500 |  |  |
Tax credit carryforward amount |  | 900 |  |  |
Foreign Tax Authority |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 9,900 |  |  |
California | State and Local Jurisdiction |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 3,400 |  |  |
Tax credit carryforward amount |  | $ 1,800 |  |  |
Tax credit carryforward, period |  | 20 years |  |  |
Indiana | State and Local Jurisdiction |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | $ 5,800 |  |  |
Other States, Tax Board | State and Local Jurisdiction |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 6,300 |  |  |
Minnesota | State and Local Jurisdiction |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |
Tax credit carryforward amount |  | $ 1,000 |  |  |
Tax credit carryforward, period |  | 15 years |  |  |

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