Concentration of Risk (Details) - Customer Concentration Risk	3 Months Ended		9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Customer receivables | Customer A
Concentration Risk [Line Items]
Concentration risk (as a percent)			39.90%	31.30%
Customer receivables | Customer B
Concentration Risk [Line Items]
Concentration risk (as a percent)			16.40%	18.80%
Sales revenue, gross | Customer A
Concentration Risk [Line Items]
Concentration risk (as a percent)	29.50%	32.10%	29.50%	31.90%
Sales revenue, gross | Customer B
Concentration Risk [Line Items]
Concentration risk (as a percent)	12.80%	16.90%	13.50%	16.00%