Business Combinations - Narrative (Details) $ / shares in Units, $ in Thousands				12 Months Ended
	Aug. 11, 2021 triggeringEvent $ / shares shares	Aug. 03, 2021 USD ($)	Dec. 02, 2020 USD ($) triggeringEvent $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) shares	Dec. 03, 2020 $ / shares shares	Dec. 31, 2018 shares
Business Acquisition [Line Items]
Stock consideration | $				$ 6,527	$ 0	$ 0
Common stock, shares issued (in shares)							323,936,240
Common stock, shares outstanding (in shares)							323,936,240
Estimated fair value of the potential earn-out shares | $			$ 587,700
Level 3 | Price Volatility
Business Acquisition [Line Items]
Earn out shares, measurement input			0.585
Level 3 | Expected Term
Business Acquisition [Line Items]
Earn out shares, measurement input			5.5
OptoGration, Inc.
Business Acquisition [Line Items]
Stock consideration | $		$ 6,300
Contingent stock consideration | $		$ 22,000
Gores Metropoulos
Business Acquisition [Line Items]
Aggregate number of Class A and Class B Common Stock shares entitled to stockholders (in shares)			25,819,887
Number of triggering events | triggeringEvent			6
Earn-out shares issued (in shares)	17,213,170
Number of triggering events met | triggeringEvent	4
Number of triggering events | triggeringEvent	6
Exchange ratio (in dollars per share) | $ / shares			$ 13.63094
Transaction costs | $			$ 17,200
Stock redeemed (in shares)			18,651
Stock redeemed, redemption price (in dollars per share) | $ / shares			$ 10.16
Gores Metropoulos | Private and Public Warrants
Business Acquisition [Line Items]
Liability recorded related to warrants from business combination | $			$ 102,400
Class A Common Stock
Business Acquisition [Line Items]
Common stock, shares issued (in shares)				266,076,525	218,818,037		218,818,037
Common stock, shares outstanding (in shares)				250,812,764	218,818,037		218,818,037
Common stock, par value (in dollars per share) | $ / shares				$ 0.0001	$ 0.0001		$ 0.0001
Granted (in shares)			16,224,474
Conversion of warrants into securities (in shares)			4,089,280
Class A Common Stock | Minimum
Business Acquisition [Line Items]
Threshold stock price trigger (in dollars per share) | $ / shares			$ 13.00
Class A Common Stock | Maximum
Business Acquisition [Line Items]
Threshold stock price trigger (in dollars per share) | $ / shares			$ 28.00
Class A Common Stock | Common Stock
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)				266,076,525	218,818,037	139,635,890		134,337,450
Shares issued to acquiree shareholders (in shares)				370,034	49,981,349
Class A Common Stock | Gores Metropoulos
Business Acquisition [Line Items]
Earn-out shares issued (in shares)	10,242,703
Earn-out shares remaining (in shares)	5,121,484
Class A Common Stock | Gores Metropoulos | Period of Time, One
Business Acquisition [Line Items]
Share price (in dollars per share) | $ / shares	$ 13.00
Class A Common Stock | Gores Metropoulos | Period of Time, Two
Business Acquisition [Line Items]
Share price (in dollars per share) | $ / shares	16.00
Class A Common Stock | Gores Metropoulos | Period of Time, Three
Business Acquisition [Line Items]
Share price (in dollars per share) | $ / shares	19.00
Class A Common Stock | Gores Metropoulos | Period of Time, Four
Business Acquisition [Line Items]
Share price (in dollars per share) | $ / shares	22.00
Class A Common Stock | Gores Metropoulos | Period of Time, Five
Business Acquisition [Line Items]
Share price (in dollars per share) | $ / shares	25.00
Class A Common Stock | Gores Metropoulos | Period of Time, Six
Business Acquisition [Line Items]
Share price (in dollars per share) | $ / shares	$ 28.00
Class A Common Stock | Gores Metropoulos | Common Stock
Business Acquisition [Line Items]
Shares issued to acquiree shareholders (in shares)			49,981,349
Class B Common Stock
Business Acquisition [Line Items]
Common stock, shares issued (in shares)				97,088,670	105,118,203		105,118,203
Common stock, shares outstanding (in shares)				97,088,670	105,118,203		105,118,203
Common stock, par value (in dollars per share) | $ / shares				$ 0.0001	$ 0.0001		$ 0.0001
Class B Common Stock | Common Stock
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)				97,088,670	105,118,203	0		0
Class B Common Stock | Gores Metropoulos
Business Acquisition [Line Items]
Earn-out shares issued (in shares)	6,970,467
Earn-out shares remaining (in shares)	3,485,233