Leases - Schedule of Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($) $ in Thousands	Apr. 30, 2025	Apr. 30, 2024
Finance Leases [Abstract]
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property and equipment, net	Property and equipment, net
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other accrued liabilities	Other accrued liabilities
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Property and equipment, at cost	$ 7,233	$ 7,017
Accumulated depreciation	(4,210)	(3,377)
Property and equipment, net	3,023	3,640
Other accrued liabilities	1,369	1,416
Other liabilities	1,770	2,324
Total finance lease liabilities	$ 3,139	$ 3,740
Weighted average remaining lease terms:
Operating leases	7 years	7 years 1 month 6 days
Finance leases	2 years 7 months 6 days	3 years 1 month 6 days
Weighted average discount rate:
Operating leases	5.90%	5.90%
Finance leases	5.70%	5.50%