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Sale-Leaseback Financing Transaction - Narrative (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jan. 31, 2023 USD ($) | Jan. 31, 2023 USD ($) renewalOption | Apr. 30, 2022 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 | $ 28,923 | 28,923 | $ 29,350
Debt issuance costs on financing liability | 723 | 723 | 768
Current portion of financing liability | 625 | 625 | 575
Long-term portion of financing liability | 28,298 | 28,298 | 28,775
Interest expense on financing liability | 329 | 990 |
Financing Liability [Line Items] |  |  |
Property, plant and equipment, at cost | 61,810 | $ 61,810 | $ 60,326
Building |  |  |
Financing Liability [Line Items] |  |  |
Useful Life (in years) |  | 20 years |
Land |  |  |
Financing Liability [Line Items] |  |  |
Property, plant and equipment, at cost | $ 41 | $ 41 |

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