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Stockholders’ Deficit - Co-Founder Grants (Details) - Restricted Stock shares in Millions, $ in Millions	1 Months Ended	3 Months Ended
	Dec. 31, 2017 tranche shares	Mar. 31, 2022 USD ($) shares	Dec. 31, 2021 shares	Mar. 31, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)		4.7
Vesting period		4 years
Awards vesting (in shares)		0.0
Co-Founder Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Number of tranches | tranche	9
Allocated share-based compensation expense | $		$ 3.6		$ 3.6
Remaining unamortized stock-based compensation | $		$ 17.5
Co-Founder Grant | Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Co-Founder Grant | Tranche One | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage vested maximum	20.00%
Co-Founder Grant | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	10.3
Awards vesting (in shares)			2.1

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

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