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Business Combinations - Narrative (Details) $ / shares in Units, $ in Thousands |  |  |  | 12 Months Ended |  |
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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 |  |  |  |  |  |  |

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