Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands			12 Months Ended
	Mar. 27, 2020	Dec. 22, 2017	Apr. 30, 2023	Apr. 30, 2022
Income Taxes [Line Items]
CARES Act, NOL carryback period (in years)	5 years
Section 174 expenditure deduction period		5 years
Deferred tax asset, Section 174 addback			$ 1,558	$ 0
Deferred tax asset valuation allowance			8,568	6,901
Foreign tax credit carryforwards			$ 638	638
Minimum
Income Taxes [Line Items]
Federal, state and local tax returns period (in years)			3 years
Foreign subsidiaries tax returns period (in years)			3 years
Maximum
Income Taxes [Line Items]
Federal, state and local tax returns period (in years)			4 years
Foreign subsidiaries tax returns period (in years)			7 years
India Income Tax Department
Income Taxes [Line Items]
Tax withholding expense			$ 406	$ 240