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Stock-Based Compensation - Narrative (Details) - USD ($)		3 Months Ended		9 Months Ended
	May 20, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Feb. 28, 2025
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation included in capitalized internal-use software		$ 500,000	$ 1,200,000	$ 2,000,000.0	$ 3,200,000
Intrinsic value of options exercised				4,700,000	12,500,000
Cost not yet recognized for stock options, amount		200,000		200,000
Incremental modification expense					1,000,000
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Incremental modification expense					700,000
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Incremental modification expense					300,000
Restricted stock units outstanding
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Cost not yet recognized for restricted stock units, amount		31,100,000		$ 31,100,000
Cost not yet recognized, period for recognition (in years)				2 years 2 months 12 days
Restricted stock units outstanding | Bonus Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Number of shares authorized (in shares)						301,571
Stock-based compensation		0	500,000	$ 2,000,000	1,800,000
Stock-based compensation included in capitalized internal-use software		0	100,000	$ 200,000	200,000
Restricted stock units outstanding | Share-Based Payment Arrangement, Nonemployee
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period (in years)				1 year
Options outstanding
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period (in years)				4 years
Cost not yet recognized, period for recognition (in years)				1 month 6 days
Expiration period (in years)				10 years
Employee Stock | 2021 Employee Stock Purchase Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Cost not yet recognized, period for recognition (in years)				9 months 18 days
Stock-based compensation		700,000	400,000	$ 1,700,000	1,200,000
Stock-based compensation included in capitalized internal-use software		0	$ 100,000	200,000	$ (400,000)
Cost not yet recognized for stock options, amount		$ 2,600,000		$ 2,600,000
Incremental modification expense	$ 1,000,000
Maximum | Restricted stock units outstanding | Share-Based Payment Arrangement, Employee
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period (in years)				4 years

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- Definition

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

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-Topic 718
-SubTopic 10
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-Section S45
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