Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024	Sep. 30, 2025	May 01, 2025	Jul. 31, 2022	Nov. 27, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 68,853	$ 57,038	$ 133,628	$ 111,721
Accrued bonus	30,700		30,700
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	57,500		$ 57,500
Unrecognized compensation cost, weighted-average recognition period			2 years 10 months 24 days
Expected dividend yield			0.00%	0.00%
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			5 years
Unrecognized compensation cost, weighted-average recognition period			3 years 8 months 12 days
Unrecognized stock-based compensation expense	$ 592,900		$ 592,900
Granted, non-option (in shares)			11,320,000
RSUs | Share-Based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentages			20.00%
Vesting period			1 year
RSUs | Share-Based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentages			5.00%
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum shares authorized (in shares)							1,700,000
Total stock-based compensation expense			$ 1,000
Stock price (in dollars per share)	$ 12.90		$ 12.90
Risk-free interest rate			3.70%
Expected dividend yield			0.00%
Expected volatility			51.40%
2020 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum shares authorized (in shares)					5,000,000
Number of shares available for grant (in shares)	2,576,959		2,576,959
2020 Incentive Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period (in years)			10 years
2020 Incentive Plan | Stock options | Share-Based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentages			20.00%
Vesting period			1 year
2020 Incentive Plan | Stock options | Share-Based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentages			2.00%
Vesting period			4 years
2020 Employee Stock Purchase Plan | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense			$ 4,300	$ 2,300
Expected dividend yield			0.00%	0.00%
Unrecognized stock-based compensation expense	$ 10,300		$ 10,300
Percentage of employee earnings participation (up to)								15.00%
Annual Bonus Program And Retention Bonus Program | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense			$ 17,000
Common Class A and Common Class B | 2020 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Automatic increase to shares reserved for future issuance, percent of total shares						7.00%
Class A Common Stock | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, non-option (in shares)			951,779	750,591
Class A Common Stock | 2020 Employee Stock Purchase Plan | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Automatic increase to shares reserved for future issuance, percent of total shares								1.00%
Shares reserved for future issuance (in shares)								3,000,000