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Leases - Summary of Future Lease Payments for Operating and Finance Leases (Detail) - USD ($) $ in Thousands | Apr. 30, 2021 | Apr. 30, 2020
--- | --- | ---
Operating and Finance Lease liabilities payments |  |
2022 | $ 4,605 |
2023 | 4,628 |
2024 | 4,674 |
2025 | 3,510 |
2026 | 3,546 |
Thereafter | 45,952 |
Total future lease payments | 66,915 |
Less amounts representing interest | (22,103) |
Present value of lease payments | 44,812 |
Less current maturities of lease liabilities | (2,396) |
Long-term maturities of lease liabilities | 42,416 |
Operating Leases |  |
2022 | 1,549 |
2023 | 1,557 |
2024 | 1,549 |
2025 | 330 |
2026 | 311 |
Thereafter | 404 |
Total future lease payments | 5,700 |
Less amounts representing interest | (761) |
Total operating lease liabilities | 4,939 |
Less current maturities of lease liabilities | (1,309) | $ (1,506)
Long-term maturities of lease liabilities | 3,630 |
Financing Leases |  |
2022 | 3,056 |
2023 | 3,071 |
2024 | 3,125 |
2025 | 3,180 |
2026 | 3,235 |
Thereafter | 45,548 |
Total future lease payments | 61,215 |
Less amounts representing interest | (21,342) |
Total finance lease liabilities | 39,873 |
Less current maturities of lease liabilities | (1,087) | (1,046)
Non-current liabilities | $ 38,786 | $ 39,873

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