Stock-Based Compensation - Narrative (Details) - USD ($)	1 Months Ended		7 Months Ended	12 Months Ended
	Sep. 30, 2020	Jan. 31, 2018	Dec. 10, 2020	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020	Nov. 27, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value for options granted (in dollars per share)				$ 19.15	$ 6.17	$ 2.22
Stock options exercised, total intrinsic value				$ 187,300,000	$ 137,300,000	$ 4,200,000
Stock options vested, total grant date fair value				35,300,000	15,000,000.0	6,800,000
Stock-based compensation expense				113,441,000	21,740,000	$ 8,310,000
Chief Executive Officer (CEO)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Notes receivable		$ 24,500,000
Proceeds from notes receivable payment	$ 26,000,000
Chief Executive Officer (CEO) | Notes Receivable
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Interest income	$ 0
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost				$ 151,000,000.0	$ 97,800,000
Unrecognized compensation cost, weighted-average recognition period (in years)				3 years 3 months 18 days	3 years 9 months 18 days
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, weighted-average recognition period (in years)				3 years 6 months	4 years 9 months 18 days
Granted, non-option (in shares)			0	13,750,000	447,000
Vesting period (in years)				5 years
Stock-based compensation expense				$ 72,900,000
Unrecognized stock-based compensation expense, non-options				$ 375,600,000	$ 32,200,000
RSUs | Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				1 year
Vesting percentages				20.00%
RSUs | Share-based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentages				4.00%
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 period (in years)				1 year
Vesting percentages				20.00%
2020 Incentive Plan | Stock options | Share-based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				4 years
Vesting percentages				2.00%
2020 Employee Stock Purchase Plan | Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of employee earnings participation (not exceeding)							15.00%
Class A Common Stock | 2020 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares)				16,232,017
Class A Common Stock | 2020 Employee Stock Purchase Plan | Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares)							3,000,000
Series F Preferred Stock | Chief Executive Officer (CEO)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period (in shares)		1,251,921