Leases - Schedule of Assets and Liabilities Related to Operating and Financing Leases (Detail) - USD ($) $ in Thousands	Jul. 31, 2022	Apr. 30, 2022
Operating Leases
Right-of-use assets	$ 7,297
Accumulated amortization	(4,010)
Right-of-use assets, net	$ 3,287
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets
Current liabilities	$ 1,613	$ 1,495
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued expenses and deferred revenue	Accrued expenses and deferred revenue
Non-current liabilities	$ 1,925
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other non-current liabilities
Total operating lease liabilities	$ 3,538
Finance Leases
Right-of-use assets	40,986
Accumulated depreciation	(6,858)
Right-of-use assets, net	$ 34,128
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, plant, and equipment, net
Current liabilities	$ 1,186	$ 1,158
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued expenses and deferred revenue	Accrued expenses and deferred revenue
Non-current liabilities	$ 37,323	$ 37,628
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Non-current liabilities
Total finance lease liabilities	$ 38,509