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Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Parenthetical) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2019 | Feb. 28, 2019 | Dec. 31, 2019 | Dec. 31, 2020
Discounts and commission |  |  |  | $ 5,040
Direct offering costs |  |  |  | $ 3,203
Series H Convertible Preferred Stock |  |  |  |
Sale of stock, temporary equity, price per share | $ 1.15 | $ 1.15 |  |
Issuance costs |  |  | $ 3 |

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