Basis of Presentation and Summary of Significant Accounting Policies - Public and Private Warrants (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Mar. 16, 2021	Feb. 05, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2021
Class of Warrant or Right [Line Items]
Proceeds from exercise of warrants			$ 153,927	$ 0	$ 0
Percentage of Class A shareholders			50.00%
Private and Public Warrants
Class of Warrant or Right [Line Items]
Proceeds from exercise of warrants	$ 153,900
Public Warrants
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)			0	13,333,309
Warrants exercised (in shares)						13,128,671
Remaining warrants redeemed (in shares)	204,638
Redemption price per warrant (in dollars per share)	$ 0.01
Private Warrants
Class of Warrant or Right [Line Items]
Stock price of warrants (in dollars per share)			$ 11.50
Warrants outstanding (in shares)			3,077,021	6,666,666
Warrants exercised (in shares)	3,589,645
Gores Metropoulos | Public Warrants | Class A Common Stock
Class of Warrant or Right [Line Items]
Stock price of warrants (in dollars per share)		$ 11.50
Gores Metropoulos | Private Warrants | Class A Common Stock
Class of Warrant or Right [Line Items]
Stock price of warrants (in dollars per share)		$ 11.50
IPO | Gores Metropoulos
Class of Warrant or Right [Line Items]
Sale of stock (in shares)		40,000,000
Sale of stock, number of shares of common stock per unit (in shares)		1
Sale of stock, number of warrants per unit (in shares)		0.3333
Sale of stock, price per share (in dollars per share)		$ 10.00
Private Placement | Gores Metropoulos | Private Warrants
Class of Warrant or Right [Line Items]
Sale of stock (in shares)		6,667,000
Sale of stock, price per share (in dollars per share)		$ 1.50