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Leases - Summary of Future Lease Payments for Operating and Finance Leases (Detail) - USD ($) $ in Thousands	Jan. 31, 2020	Apr. 30, 2019
Operating and Finance Lease liabilities payments
2020	$ 1,612
2021	6,141
2022	5,976
2023	5,840
2024	4,847
2025	3,510
Thereafter	49,532
Total future lease payments	77,458
Less amounts representing interest	(25,396)
Present value of lease payments	52,062
Less current maturities of lease liabilities	(3,702)
Long-term maturities of lease liabilities	48,360
Operating Leases
2020	864
2021	3,125
2022	2,920
2023	2,769
2024	1,722
2025	330
Thereafter	679
Total future lease payments	12,409
Less amounts representing interest	(1,520)
Total operating lease liabilities	10,889
Less current maturities of lease liabilities	(2,731)
Long-term maturities of lease liabilities	8,158
Financing Leases
2020	748
2021	3,016
2022	3,056
2023	3,071
2024	3,125
2025	3,180
Thereafter	48,853
Total future lease payments	65,049
Less amounts representing interest	(23,876)
Total finance lease liabilities	41,173
Less current maturities of lease liabilities	(971)	$ (681)
Long-term maturities of lease liabilities	$ 40,202	$ 45,400

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