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Convertible Preferred Stock - Summary of Convertible Preferred Stock (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2019 | Dec. 31, 2019
Temporary Equity [Line Items] |  |
Exchange, including deemed dividend | $ 5,326 |
Series A Preferred |  |
Temporary Equity [Line Items] |  |
Beginning balance | $ 12,575 | $ 12,575
Beginning balance, Shares | 3,146,551 | 3,146,551
Conversion to common stock |  | $ (12,575)
Conversion to common stock, shares |  | (3,146,551)
Series A-1 Preferred |  |
Temporary Equity [Line Items] |  |
Beginning balance | $ 24,994 | $ 24,994
Beginning balance, Shares | 7,372,719 | 7,372,719
Conversion to common stock |  | $ (24,994)
Conversion to common stock, shares |  | (7,372,719)
Series A-2 Preferred |  |
Temporary Equity [Line Items] |  |
Beginning balance | $ 6,352 | $ 6,352
Beginning balance, Shares | 1,873,777 | 1,873,777
Exchange, including deemed dividend | $ 4,764 | $ (4,764)
Exchange, including deemed dividend, Shares | (1,405,332) | (1,405,332)
Conversion to common stock |  | $ (1,588)
Conversion to common stock, shares |  | (468,445)
Series B Preferred Stock |  |
Temporary Equity [Line Items] |  |
Issuance |  | $ 50,000
Issuance, shares | 6,963,788 | 6,963,788
Exchange, including deemed dividend | $ 10,090 | $ 10,090
Exchange, including deemed dividend, Shares | 1,405,332 | 1,405,332
Issuance costs |  | $ (1,293)
Conversion to common stock |  | $ (58,797)
Conversion to common stock, shares |  | (8,369,120)
Convertible Preferred Stock |  |
Temporary Equity [Line Items] |  |
Beginning balance | $ 43,921 | $ 43,921
Beginning balance, Shares | 12,393,047 | 12,393,047
Issuance |  | $ 50,000
Issuance, shares |  | 6,963,788
Exchange, including deemed dividend |  | $ 5,326
Issuance costs |  | (1,293)
Conversion to common stock |  | $ (97,954)
Conversion to common stock, shares |  | (19,356,835)

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