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Organization, basis of presentation, and summary of significant accounting policies - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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May 25, 2025 | May 26, 2024
Accounting Policies [Abstract] |  |
Cash paid for income taxes, net | $ 46 | $ 72
Cash paid for interest | 1,907 | 2,730
Non-cash investing and financing activities: |  |
Purchases of property, plant, and equipment in accounts payable | 1,539 | 7,858
Non-cash portion of sale of property, plant and equipment via note receivable | 9,590 | 0
Increases to property, plant and equipment from finance leases | 2,737 | 0
Capitalization of non-cash interest to property, plant, and equipment | 3,049 | 3,150
Dividends paid-in-kind on Redeemable Convertible Preferred Stock | $ 3,318 | $ 3,078

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