Supplemental Financial Information - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Apr. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued expenses	$ 8,031	$ 2,652
Current portion of operating lease liabilities	$ 1,065	$ 0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other current liabilities	Accrued expenses and other current liabilities
Income tax payable	$ 1,226	$ 625
Accrued expenses and other current liabilities	$ 10,322	$ 3,277