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Common Stock, Voting Rights, Votes

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Share-based Compensation Arrangement by Share-based Payment Award, Automatic Annual Increase, Period

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options Granted in Period, Fair Value

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Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Number of Threshold Stock Price Targets

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Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Threshold Stock Price Target

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Share-based Compensation Arrangement by Share-based Payment Award, Look-back Period

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Share-Based Compensation Arrangement by Share-Based Payment Award, Number Of Purchase Dates

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate number of common shares reserved for future issuance.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements payable after one year (or the operating cycle, if longer).

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Discount rate from fair value on purchase date that participants pay for shares.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of additional shares authorized for issuance under share-based payment arrangement.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Percentage of vesting of award under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Equity - Narrative (Details) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended			6 Months Ended	12 Months Ended
	Feb. 01, 2022 shares	Sep. 30, 2021 target date shares	May 31, 2021 USD ($) $ / shares shares	Apr. 30, 2022 USD ($) vote $ / shares shares	Apr. 30, 2021 USD ($) $ / shares	Apr. 30, 2020 USD ($)	Jul. 31, 2016	Jan. 31, 2022 USD ($) $ / shares shares	Jan. 31, 2021	Oct. 18, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares authorized (in shares) \| shares				50,000,000				50,000,000		50,000,000
Preferred stock, par value (in USD per share) \| $ / shares				$ 0.0000025				$ 0.0000025		$ 0.0000025
Shares subject to repurchase obligation (in shares) \| shares				503,216				713,967
Deferred compensation liability, noncurrent \| $				$ 4,800				$ 6,800
Additional shares added (in shares) \| shares				7,344,000				22,532,000
Aggregate intrinsic value, options vested \| $				$ 9,400		$ 2,300
Options granted (in USD per share) \| $ / shares				$ 0	$ 7.68
Intrinsic value of options exercised \| $				$ 30,800	$ 10,100
Compensation expense not yet recognized \| $				252,200				$ 101,800
Stock-based compensation \| $				17,471	3,431
Number of purchase dates \| date		4
Tax benefit for stock-based compensation expense \| $				$ 900	$ 0
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares) \| shares				1,500,000,000				1,500,000,000		1,500,000,000
Common stock, par value (in USD per share) \| $ / shares				$ 0.0000025				$ 0.0000025		$ 0.0000025
Voting rights, vote per share \| vote				1
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares) \| shares				250,000,000				250,000,000		250,000,000
Common stock, par value (in USD per share) \| $ / shares				$ 0.0000025				$ 0.0000025		$ 0.0000025
Voting rights, vote per share \| vote				10
2021 Equity Incentive Plan \| Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares) \| shares		13,032,289
Additional shares added (in shares) \| shares	7,344,382
Shares subject to the 2021 ESPP \| 2021 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period for recognition (in years)				1 year 7 months 6 days
Compensation expense not yet recognized \| $				$ 27,400
Stock-based compensation \| $				$ 4,400
Discount rate (as a percent)		15.00%
Look-back period (in months)		27 months
Shares subject to the 2021 ESPP \| 2021 Employee Stock Purchase Plan \| Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares) \| shares		3,271,090
Additional shares added (in shares) \| shares	1,468,876
Automatic annual increase period (in years)		10 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period for recognition (in years)				1 year 4 months 24 days					2 years 3 months 18 days
Stock options \| 2015 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period (in years)							10 years
Stock options \| 2015 Equity Incentive Plan \| Period one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage							25.00%
Award vesting period (in years)							1 year
Stock options \| 2015 Equity Incentive Plan \| Period two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)							36 months
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted in period (in shares) \| shares				3,258,000				3,290,000
RSUs \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted in period (in shares) \| shares			3,000,000
Grant date fair value \| $			$ 8,800
Number of threshold stock price targets \| target		8
Compensation expense not yet recognized \| $			$ 8,800	$ 7,200
Stock-based compensation \| $				$ 400
RSUs \| Chief Executive Officer \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period for recognition (in years)			2 years 9 months 29 days	2 years
Threshold stock price target (in USD per share) \| $ / shares			$ 95
RSUs \| Chief Executive Officer \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period for recognition (in years)			7 years 6 months	7 years
Threshold stock price target (in USD per share) \| $ / shares			$ 500
RSUs \| 2021 Equity Incentive Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)				2 years
RSUs \| 2021 Equity Incentive Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)				4 years