Stock-Based Compensation Plan - Narrative (Details) $ / shares in Units, $ in Thousands		3 Months Ended
	Jan. 21, 2021 USD ($) employee position tradingDay $ / shares shares	Mar. 31, 2022 USD ($) stockIncentivePlan $ / shares shares	Mar. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2021 $ / shares	Dec. 31, 2020 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock incentive plans | stockIncentivePlan		3
Stock-based compensation expense | $		$ 1,684	$ 41,963
Options outstanding, intrinsic value (in usd per share)		$ 0.80
Options exercisable, intrinsic value (in usd per share)		$ 0.80
Earnout shares, earnout period	60 months
Derivative Instrument, Period One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earnout shares, earnout period	60 months
Earnout shares, earnout period, stock price trigger (in dollars per share)	$ 12.50
Earnout shares, earnout period, threshold trading days | tradingDay	20
Earnout shares, earnout period, threshold trading day period | tradingDay	30
Earnout shares, earnout period, release of shares, percentage	50.00%
Derivative Instrument, Period Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earnout shares, earnout period, stock price trigger (in dollars per share)	$ 15.00
Earnout shares, earnout period, threshold trading days | tradingDay	20
Earnout shares, earnout period, threshold trading day period | tradingDay	30
Earnout shares, earnout period, release of shares, percentage	50.00%
Derivative Instrument, Period Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earnout shares, earnout period, stock price trigger (in dollars per share)	$ 10.00
Earnout RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $		$ 0
Granted (in usd per share)		$ 0	$ 10.70
Earnout restricted stock units received (in shares) | shares	640,421	0	640,421
Unrecognized compensation costs related to RSUs | $		$ 0
2011 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $		$ 1,684	$ 41,963
Options outstanding exercise price (in usd per share)		$ 0.57	$ 0.58	$ 0.56	$ 0.59
2017 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, intrinsic value (in usd per share)		0.45
Options exercisable, intrinsic value (in usd per share)		0.45
Options outstanding exercise price (in usd per share)		$ 0.92	0.92	0.92	0.92
Stock options, expiration period		10 years
Award vesting conditions waived for options (in shares) | shares	3,538,672
Award vesting period	4 years
2017 Stock Option Plan | Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Modification, number of employees impacted | employee	8
Share-based compensation on modification | $	$ 38,800
2017 Stock Option Plan | Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $		$ 249
Modification, number of employees impacted | position	16
Plan modification, options, cash consideration | $	$ 186
Plan modification, options, compensation recognized | $	$ 4,500
2020 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $		$ 908
Options outstanding, intrinsic value (in usd per share)		$ 0.00
Options exercisable, intrinsic value (in usd per share)		0.00
Options outstanding exercise price (in usd per share)		$ 6.13	$ 11.35	$ 11.12	$ 0
Unrecognized compensation cost related to unvested option | $		$ 8,609
2020 Stock Option Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value (in usd per share)		$ 1.17
2020 Stock Incentive Award Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
2020 Stock Incentive Award Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		4 years
2020 Stock Incentive Award Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $		$ 527
Unrecognized compensation cost related to unvested option | $		$ 1,454
Granted (in usd per share)		$ 1.68
Earnout restricted stock units received (in shares) | shares		1,235,437
2020 Stock Incentive Award Plan | Restricted Stock Units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in usd per share)		$ 1.68
2020 Stock Incentive Award Plan | Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
2020 Stock Incentive Award Plan | Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Unrecognized compensation cost related to unvested option | $		$ 2,047
2020 Stock Incentive Award Plan | Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
2020 Stock Incentive Award Plan | Tranche Three | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested option | $		$ 164