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v3.23.2

Significant Accounting Policies and Disclosures - Additional Information (Details) | 12 Months Ended
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May 27, 2023 USD ($) Number $ / shares shares | May 28, 2022 USD ($) $ / shares shares | May 29, 2021 USD ($) $ / shares shares
Significant Accounting Policies and Disclosures [Line Items] |  |  |
Allowance for doubtful accounts | $ 191,000 | $ 186,000 |
Foreign exchange (gain) loss | 278,000 | 273,000 | $ 759,000
Finished goods | 93,400,000 | 66,600,000 |
Raw material | 11,800,000 | 8,000,000.0 |
Work in progress | 5,200,000 | 5,800,000 |
Inventory valuation reserves | 5,900,000 | 6,100,000 |
Inventory provisions | 466,000 | 462,000 | 1,041,000
Investments - current | 0 | 5,000,000 |
Depreciation | 3,400,000 | 3,200,000 | 3,200,000
Construction in progress | 4,437,000 | 1,991,000 |
Other non-current liabilities | 612,000 | 766,000 |
Share-based compensation expense | $ 936,000 | $ 654,000 | $ 675,000
Stock option vesting period | 5 years |  |
Option terms to exercise | 10 years |  |
Exercised | shares | 440,480,000 |  |
Proceeds from share exercised | $ 3,800,000 |  |
Weighted average fair value of stock option grants | $ / shares | $ 5.44 | $ 1.5 | $ 0.49
Total unrecognized compensation costs | $ 1,800,000 |  |
Total grant date fair value stock options vested | $ 300,000 |  |
Limit of cash dividends Class B common stock (percent) | 90.00% |  |
Common stock options anti-dilutive | shares | 0 | 0 | 0
Common Stock |  |  |
Significant Accounting Policies and Disclosures [Line Items] |  |  |
Common stock shares, authorized | shares | 17,000,000 |  |
Common Class B |  |  |
Significant Accounting Policies and Disclosures [Line Items] |  |  |
Common stock shares, authorized | shares | 3,000,000 |  |
Number of votes per share | Number | 10 |  |
Employees' 2011 Long-Term Incentive Compensation Plan |  |  |
Significant Accounting Policies and Disclosures [Line Items] |  |  |
Number of shares authorized | shares | 3,500,000 |  |
Number of shares for future issuance | shares | 1,028,000 |  |
Option exercisable period | 5 years |  |
Facilities |  |  |
Significant Accounting Policies and Disclosures [Line Items] |  |  |
Construction in progress | $ 2,200,000 |  |
Manufacturing Facilities |  |  |
Significant Accounting Policies and Disclosures [Line Items] |  |  |
Construction in progress | 1,600,000 |  |
IT systems |  |  |
Significant Accounting Policies and Disclosures [Line Items] |  |  |
Construction in progress | $ 600,000 |  |
Maximum |  |  |
Significant Accounting Policies and Disclosures [Line Items] |  |  |
Services revenue recognized as percentage of aggregate revenue | 5.00% |  |
Intrinsic value | $ 4,700,000 | $ 1,900,000 | $ 100,000
Period of recognition | 4 years |  |
Maximum | Employees' 2011 Long-Term Incentive Compensation Plan |  |  |
Significant Accounting Policies and Disclosures [Line Items] |  |  |
Option terms to exercise | 10 years |  |
Minimum |  |  |
Significant Accounting Policies and Disclosures [Line Items] |  |  |
Period of recognition | 2 years |  |

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