Stockholders' Equity (Details) $ / shares in Units, $ in Thousands			1 Months Ended				2 Months Ended	3 Months Ended	12 Months Ended
	Dec. 16, 2020 USD ($) $ / shares shares	Mar. 02, 2020 $ / shares shares	Mar. 31, 2021 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) $ / shares	Sep. 30, 2019 USD ($) $ / shares	Mar. 31, 2019 USD ($)	May 31, 2020 USD ($) $ / shares	Mar. 31, 2021 USD ($) $ / shares	Dec. 31, 2021 USD ($) vote $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($)
Class of Stock [Line Items]
Shares authorized (in shares)	635,000,000								635,000,000
Common stock, shares authorized (in shares)									625,000,000	625,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001								$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	10,000,000								10,000,000	10,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.0001								$ 0.0001	$ 0.0001
Number of shares issued (in shares)	15,853,052	69,000,000							10,033,333
Aggregate consideration | $	$ 158,500		$ 408,000	$ 11,700
Issuance costs | $			$ 5,900					$ 6,800
Stock sold, price per share (in dollars per share) | $ / shares	$ 10.00	$ 10.00	$ 23.34	$ 43.11				$ 23.34
Carrying value of long-term debt and accrued interest converted to redeemable convertible preferred stock | $					$ 9,800	$ 5,000			$ 0	$ 0	$ 14,852
Change in fair value | $										$ 21,700
Underwritten Public Offering
Class of Stock [Line Items]
Number of shares issued (in shares)			17,000,000
Number of shares available at election (in shares)			19,800,000
Over-Allotment Option
Class of Stock [Line Items]
Number of shares available at election (in shares)			4,800,000
Class A Common Stock
Class of Stock [Line Items]
Common stock, votes per share | vote									1
Common stock, shares authorized (in shares)	500,000,000								500,000,000	500,000,000
Common stock, par value (in dollars per share) | $ / shares									$ 0.0001
Class B Common Stock
Class of Stock [Line Items]
Common stock, votes per share | vote									20
Common stock, shares authorized (in shares)	125,000,000								125,000,000	125,000,000
Common stock, par value (in dollars per share) | $ / shares									$ 0.0001
Series D-1 Preferred Stock
Class of Stock [Line Items]
Aggregate consideration | $					$ 25,000
Stock sold, price per share (in dollars per share) | $ / shares					$ 21.516
Series E Preferred Stock
Class of Stock [Line Items]
Aggregate consideration | $							$ 65,000
Stock sold, price per share (in dollars per share) | $ / shares							$ 43.11