Convertible Preferred Stock (Tables)

12 Months Ended

Dec. 31, 2021

Temporary Equity Disclosure [Abstract]

Temporary Equity

The following tables summarize the authorized, issued and outstanding convertible preferred stock of the Company (in millions, except share and per share data):

	December 31, 2020
	Issuance Price Per Share		Authorized Shares	Shares Issued and Outstanding	Net Carrying Value		Liquidation Preference
Preferred A-1 Stock	$	0.56965	40,959,815	40,959,815	$	3.4	$	3.4
Preferred A-2 Stock	1.57432		48,790,097	48,590,772	10.9		11.0
Preferred B Stock	3.59757		48,326,627	48,326,627	24.9		25.0
Preferred C Stock	7.04471		69,101,902	69,101,895	56.1		70.0
Preferred C-1 Stock	11.74119		17,145,581	—	—		—
Preferred D Stock	15.16420		45,860,183	45,860,183	99.8		100.0
Preferred E Stock	19.66420		53,048,255	53,048,151	149.7		150.0
Total			323,232,460	305,887,443	$	344.8	$	359.4

Fair Value Measurement Inputs and Valuation Techniques

The following assumptions were used in determining fair value of the convertible preferred stock warrant liabilities:

	December 31, 2020
Fair value of Series A-2 Preferred Stock	$18.25
Fair value of Series C-1 Preferred Stock	$20.09
Exercise price A-2 Preferred Stock	$1.57
Exercise price C-1 Preferred Stock	$11.74
Expected term (in years)	1.8-6.2
Expected volatility	29.0%-40.7%
Risk-free interest rate	0.1%-0.5%
Expected dividend yield	—	%