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Sale-Leaseback Financing Transaction - Narrative (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jan. 31, 2024 USD ($) | Jan. 31, 2023 USD ($) | Jan. 31, 2024 USD ($) renewalOption | Jan. 31, 2023 USD ($) | Apr. 30, 2023 USD ($)
Financing Liability [Abstract] |  |  |  |  |
Term of agreement | 20 years |  | 20 years |  |
Number of renewal options | renewalOption |  |  | 4 |  |
Renewal term | 5 years |  | 5 years |  |
Initial basic monthly rent |  |  | $ 158 |  |
Annual rental increase, as a percent |  |  | 2.00% |  |
Discount rate | 4.75% |  | 4.75% |  |
Gain (loss) on sale leaseback agreement |  |  | $ 0 |  |
Financing liability | $ 28,298 |  | 28,298 |  | $ 28,774
Debt issuance costs on financing liability | 663 |  | 663 |  | 708
Current portion of financing liability | 695 |  | 695 |  | 642
Long-term portion of financing liability | 27,603 |  | 27,603 |  | 28,132
Interest expense on financing liability | 321 | $ 329 | 968 | $ 990 |
Financing Liability [Line Items] |  |  |  |  |
Property, plant and equipment, at cost | $ 64,208 |  | $ 64,208 |  | $ 61,368
Building |  |  |  |  |
Financing Liability [Line Items] |  |  |  |  |
Useful Life (in years) | 20 years |  | 20 years |  |
Land |  |  |  |  |
Financing Liability [Line Items] |  |  |  |  |
Property, plant and equipment, at cost | $ 41 |  | $ 41 |  |

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