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Annual increase to stock available for issuance as a threshold percentage of outstanding shares of Company's capital stock as of the last day of the immediately preceding fiscal year, under the plan.

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Ratio applied to the conversion of redeemable convertible preferred stock to common stock.

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Amount of expense for employee benefit and equity-based compensation.

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

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Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of options vested.

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Purchase price of common stock expressed as a percentage of its fair value.

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Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

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Stock-based Compensation - Additional Information (Details)			1 Months Ended				3 Months Ended		12 Months Ended
	Jan. 01, 2022 shares	May 20, 2021 USD ($) PurchasePeriod shares	Nov. 30, 2021 $ / shares shares	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019 $ / shares shares	Mar. 31, 2022 USD ($) shares	Mar. 31, 2021 USD ($) shares	Dec. 31, 2021 USD ($) shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options issued \| shares							6,864,752		7,642,690
Total unrecognized stock-based compensation expense \| $							$ 8,700,000
Total unrecognized compensation cost, weighted-average period							10 months 24 days
Stock-based compensation expense \| $							$ 37,209,000	$ 10,303,000
Participation end period description							Participants may end their participation at any time prior to the last 15 days of a purchase period
Accrued salary, payroll tax, and employee benefit liabilities \| $							$ 32,043,000		$ 25,997,000
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, weighted-average period							2 years 7 months 6 days
Total unrecognized stock-based compensation expense \| $							$ 410,700,000
Number of shares, vested \| shares							706,663
Restricted Stock Awards \| Levelset
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of unregistered common stock for certain employees \| shares			199,670
Business acquisition, vesting period			2 years
Share price per share \| $ / shares			$ 95.05
Number of shares vested \| shares							24,954		0
Stock-based compensation expense \| $							$ 2,400,000
Restricted Series H-1 Redeemable Convertible Preferred Stock Awards (?RSAs?)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted \| shares						205,464
Weighted average grant date fair value, granted \| $ / shares						$ 26.75
Number of shares, vested \| shares								102,732
Recognized stock-based compensation expense \| $								$ 700,000
Redeemable convertible preferred stock conversion ratio							1
Restricted Series H-1 Redeemable Convertible Preferred Stock Awards (?RSAs?) \| First Anniversary
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of shares released from restriction					50.00%
Restricted Series H-1 Redeemable Convertible Preferred Stock Awards (?RSAs?) \| Second Anniversary
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of shares released from restriction				50.00%
IPO \| Restricted Stock Units \| Quarterly or Annual Vesting Schedule
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs vesting period							4 years
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, weighted-average period							4 months 24 days
Total unrecognized stock-based compensation expense \| $							$ 9,300,000
Stock-based compensation expense \| $							$ 3,400,000
Offering period		12 months
Number of purchase periods \| PurchasePeriod		2
Duration of purchase periods		6 months
Percentage of eligible compensation		15.00%
Maximum amount each participant can contribute to a defined contribution plan per calendar year \| $		$ 25,000
Maximum number of shares each participant can purchase during purchase period \| shares		2,500
Purchase price, threshold percentage of fair market value		85.00%
Expected dividend yield utilized							0.00%
Accrued salary, payroll tax, and employee benefit liabilities \| $							$ 10,400,000
Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense \| $								$ 5,500,000
Common Stock \| Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of outstanding shares		1.00%
Maximum number of shares of common stock that may be issued \| shares	1,340,469	2,600,000
Maximum number of additional shares of common stock that may be issued \| shares		3,900,000
Number of period of common stock reserved for issuance		10 years
2021 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options issued \| shares		0
2021 Equity Incentive Plan \| Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares initially available for issuance \| shares	6,702,346	30,962,615					31,583,877
Percentage of outstanding shares	5.00%