Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended			3 Months Ended
	Mar. 31, 2024	May 31, 2022	Sep. 30, 2021	Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value of options granted (in dollars per share)					$ 0.99
Stock-based compensation expense				$ 3,344	$ 5,670
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, period for recognition (in years)				2 years 7 months 20 days
Unrecognized compensation costs	$ 15,600			$ 15,600
RSUs | New Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)				4 years
Award cliff vesting period (in years)				1 year
RSUs | Existing Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)				3 years
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)		800,000
Total grant date fair value				$ 4,000
Stock-based compensation expense				$ 200	$ 400
Unrecognized compensation cost, period for recognition (in years)				2 years 1 month 28 days
Unrecognized compensation costs	$ 800			$ 800
PSUs | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)	700,000
Total grant date fair value	$ 100
PSUs | Tranche 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate fair value of equity instruments vested during the period				1,300
PSUs | Tranche 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate fair value of equity instruments vested during the period				1,400
PSUs | Tranche 3
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate fair value of equity instruments vested during the period				1,400
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested share-based compensation arrangements granted	$ 5,700			$ 5,700
Unrecognized compensation cost, period for recognition (in years)				2 years 8 months 4 days
2021 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, period for increase in shares (in years)			10 years
Percent of outstanding shares			4.00%
2021 Equity Incentive Plan | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, maximum number of shares available for issue on the exercise of incentive stock options (in shares)			100,000,000
2021 Employee Stock Purchase Plan | 2021 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, period for increase in shares (in years)			10 years
Percent of outstanding shares			1.00%
Stock-based compensation, number of additional shares allowable under the plan (in shares)			2,850,000
Stock-based compensation, purchase period (in months)			6 months
2021 Employee Stock Purchase Plan | Class A Common Stock | 2021 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, discount percentage from market price, beginning of period			85.00%