Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Income Tax Contingency [Line Items]
Deferred tax assets valuation allowance	$ 14,400,000	$ 241,000
Increase in deferred tax assets valuation allowance	$ 14,200,000
Effective tax rate	16.80%	24.20%	10.80%
Effective tax rate excluding impact of non-cash goodwill impairment charges	19.60%		17.40%
Undistributed earnings of foreign subsidiary	$ 228,000
Gross tax-effected unrecognized tax benefits	0	$ 0
Federal
Income Tax Contingency [Line Items]
Net operating loss carryforwards	0	0
Credits	0	0
State
Income Tax Contingency [Line Items]
Net operating loss carryforwards	0	0
Credits	$ 0	$ 0