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Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
May 29, 2024 | May 31, 2025 | May 31, 2024 | May 31, 2025 | May 31, 2024 | May 31, 2023 | Feb. 01, 2024
Description of Business and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Impairment charge of long-lived assets |  |  |  | $ 50,813,000 | [1] |  | $ 484,000 |
Impairment of goodwill |  | $ 50,050,000 |  |  |  | $ (14,210,000) |  |
Contract assets |  | 0 | $ 0 | 0 |  | 0 |  |
Unbilled receivables |  | 0 | 0 | 0 |  | 0 |  |
Derivative financial instruments, credit losses |  |  |  | 0 |  |  |  |
Allowance for doubtful accounts increase (decrease) |  |  |  | 564,000 |  |  |  |
Receivables, allowances |  | $ 907,000 | 343,000 | 907,000 |  | 343,000 |  |
Inventory obsolescence reserve |  |  | 4,600,000 |  |  | 4,600,000 |  |
Depreciation Expenses |  |  |  | 34,490,000 |  | 36,793,000 | 34,017,000 |
Advertising Expenses |  |  |  | $ 28,235,000 |  | 29,618,000 | $ 28,365,000 |
Excess dividends received from investing activity |  |  |  |  |  | 1,085,000 |  |
WAVE |  |  |  |  |  |  |  |
Description of Business and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Excess dividends received from investing activity |  |  |  |  |  | 1,085,000 |  |
Maximum |  |  |  |  |  |  |  |
Description of Business and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Period allowed for payment of dues to customers |  |  |  | 60 days |  |  |  |
Maximum | Building and Building Improvements |  |  |  |  |  |  |  |
Description of Business and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful life |  | 40 years |  | 40 years |  |  |  |
Maximum | Machinery and Equipment |  |  |  |  |  |  |  |
Description of Business and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful life |  | 20 years |  | 20 years |  |  |  |
Minimum |  |  |  |  |  |  |  |
Description of Business and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Period allowed for payment of dues to customers |  |  |  | 30 days |  |  |  |
Minimum | Building and Building Improvements |  |  |  |  |  |  |  |
Description of Business and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful life |  | 10 years |  | 10 years |  |  |  |
Minimum | Machinery and Equipment |  |  |  |  |  |  |  |
Description of Business and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful life |  | 3 years |  | 3 years |  |  |  |
Hexagon |  |  |  |  |  |  |  |
Description of Business and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Percent of noncontrolling interest | 49.00% |  |  |  |  |  |  |
Percentage of sale of nominal share capital of former Sustainable Energy Solutions | 51.00% |  |  |  |  |  |  |
Percentage of shares held by members of existing management team of joint venture | 2.00% |  |  |  |  |  |  |
Impairment charge of long-lived assets |  |  | 32,203,000 |  |  |  |  |
Impairment of goodwill |  |  | $ 14,210,000 |  |  |  |  |
Deconsolidation, loss |  |  |  |  |  | (30,502,000) |  |
Deal costs |  |  |  | $ 473,000 |  | $ 1,250,000 |  |
Hexagon | Joint Venture Transactions |  |  |  |  |  |  |  |
Description of Business and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Percent of noncontrolling interest | 49.00% |  |  |  |  |  |  |
Halo |  |  |  |  |  |  |  |
Description of Business and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Percent of controlling interest by the Company |  |  |  |  |  |  |  | 80.00%
[1] | Significant pre-tax impairment charges include $50,050 in the fourth quarter of fiscal 2025 related to the write-down of intangible assets associated with GTI.

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