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Stockholders' Equity - Class A Common Stock and Class B Common Stock, Reverse Stock Split (Details) | 12 Months Ended
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Dec. 31, 2020 vote
Common Class B To Common Class A |
Class of Stock [Line Items] |
Number of shares to be issued per share upon conversion (in shares) | 1
Number of shares to be issued per share upon automatic conversion (in shares) | 1
Automatic conversion threshold as a percent of Class B common stock | 10.00%
Class A common stock |
Class of Stock [Line Items] |
Common stock, number of votes | 1
Class B common stock |
Class of Stock [Line Items] |
Common stock, number of votes | 10

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