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Commitments and Contingencies - Lease Maturity Schedule (Details) - USD ($) $ in Thousands | Jul. 31, 2019 | Apr. 30, 2019
--- | --- | ---
Capital leases |  |
2020 | $ 3,104 |
2021 | 3,112 |
2022 | 3,119 |
2023 | 3,099 |
2024 | 2,113 |
Thereafter | 8,884 |
Total minimum lease payments | 23,431 |
Less amount representing interest | 7,357 |
Present value of net minimum lease payments | 16,074 |
Operating leases |  |
2020 | 1,969 |
2021 | 1,907 |
2022 | 1,850 |
2023 | 1,765 |
2024 | 1,666 |
Thereafter | 27,328 |
Total minimum lease payments | 36,485 |
Less amount representing interest | 14,251 |
Present value of net minimum lease payments | $ 22,234 |
Capital leases |  |
2020 |  | $ 3,103
2021 |  | 3,109
2022 |  | 3,096
2023 |  | 3,098
2024 |  | 2,548
Thereafter |  | 9,215
Total minimum lease payments |  | 24,169
Less amount representing interest |  | 7,689
Present value of net minimum lease payments |  | 16,480
Operating leases |  |
2020 |  | 1,703
2021 |  | 1,547
2022 |  | 1,354
2023 |  | 1,228
2024 |  | 1,066
Thereafter |  | 10,438
Total minimum lease payments |  | $ 17,336

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