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v3.25.2

Related party transactions (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
May 31, 2023 | May 26, 2024 | May 25, 2025 | May 26, 2024 | May 28, 2023
Related Party Transaction [Line Items] |  |  |  |  |
Current liabilities, current |  | $ 2,113 | $ 3,415 | $ 2,113 |
Contract liability, noncurrent |  | 4,960 | 3,025 | 4,960 |
Debt principal |  | 187,539 | 188,350 | 187,539 |
Proceeds from sale of equipment |  |  | 7,000 | 0 |
Operating lease payment |  |  | 445 | 761 |
Non-cash interest expense |  |  | 20,247 | 15,442 |
Line of credit | Term loan credit facility with related party |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Debt principal |  | 157,313 | $ 173,508 | $ 157,313 |
Stated interest rate |  |  | 10.00% |  |
Revenues | Alcon | Customer concentration risk |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Concentration risk percentage |  |  | 44.00% | 39.00% |
Alcon |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Advances to affiliate |  | 1,207 | $ 307 | $ 1,207 |
Alcon | Contract liability prepayment |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related party transaction, amount |  | 5,500 |  |  |
Related party |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Current liabilities, current |  | $ 1,025 | 2,731 | 1,025 |
Interest expense, net |  |  | 18,879 | 14,662 |
Non-cash interest expense |  |  | 18,473 | 14,186 |
Contract asset |  |  | 110 |  |
Related party | Alcon |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Credit memo |  |  | 5,500 |  |
Current liabilities, current |  |  | 2,731 |  |
Contract liability, noncurrent |  |  | 2,768 |  |
Proceeds from term borrowings |  |  | 142,270 |  |
Proceeds from sale of equipment | $ 7,730 |  |  |  |
Operating lease, term of contract |  |  |  |  | 10 years
Operating lease payment |  |  | $ 1,185 | $ 970 |

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