Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended			3 Months Ended			6 Months Ended	9 Months Ended
	May 14, 2024	Mar. 31, 2025	Aug. 31, 2021	Apr. 30, 2021	Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2025	Sep. 30, 2025	Sep. 30, 2024	Jan. 31, 2025	Dec. 31, 2024	Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based payment arrangement, expense					$ 2,084		$ 2,958		$ 7,081	$ 9,523
Common stock, authorized					500,000,000				500,000,000			500,000,000
Number of Options, Granted					0		0	0	0	2,527,000
Outstanding Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based payment arrangement, expense					$ 184		$ 162		$ 692	$ 1,528
Vesting of RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based payment arrangement, expense					1,897		2,793		6,376	7,935
Unrecognized compensation expense					13,278				$ 13,278
RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized Compensation Expense Period									2 years 4 months 24 days
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense					$ 1,709				$ 1,709
Unrecognized Compensation Expense Period									2 years
2018 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation arrangement vesting period									4 years
Amended 2018 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Granted				0
Amended 2018 Stock Plan | RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation arrangement vesting period				4 years
Share-based compensation arrangement, options granted				1,533,000
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value				$ 21.55
Share-based payment arrangement, expense				$ 33,033
2021 Equity Incentive Plan | Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, authorized					15,500,000				15,500,000
Annual additions to the plan	8,900,000
2021 Equity Incentive Plan | RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation arrangement vesting period			4 years
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based payment arrangement, expense					$ 3		$ 3		$ 13	$ 60
Annual additions to the plan						1,920,000
Number of shares available for sale		8,889,000			8,761,000	8,889,000		8,889,000	8,761,000			7,109,000
Employee Stock Purchase Plan | Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation by share based arrangement, quoted market price on purchase date									85.00%
Shares reserved for future issuance					2,000,000				2,000,000
Percentage of shares reserved for future issuance									1.00%
2025 Inducement Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance period		5 years
2025 Inducement Equity Incentive Plan | Share-Based Payment Arrangement, Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation arrangement vesting period		4 years
Share based compensation by share based arrangement, shares achieved vesting percentage		50.00%
2025 Inducement Equity Incentive Plan | Share-Based Payment Arrangement, Tranche Two
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation arrangement vesting period		5 years
Share based compensation by share based arrangement, shares achieved but not yet paid vesting percentage		100.00%
2025 Inducement Equity Incentive Plan | Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance											6,500,000
2025 Inducement Equity Incentive Plan | Time-Based RSUs | Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement, options granted		1,791,000
2025 Inducement Equity Incentive Plan | PSUs | Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement, options granted		2,320,000
Minimum | 2021 Equity Incentive Plan | RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation arrangement vesting period			1 year
Maximum | 2021 Equity Incentive Plan | Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for sale	24,400,000
Maximum | 2021 Equity Incentive Plan | RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation arrangement vesting period			3 years
Maximum | Employee Stock Purchase Plan | Class A Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance													2,000,000
Maximum | 2025 Inducement Equity Incentive Plan | PSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation by share based arrangement, quoted market price on purchase date		200.00%