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Convertible Preferred Stock - Additional Information (Details) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Oct. 27, 2020 shares | Oct. 19, 2020 | Mar. 31, 2019 USD ($) $ / shares shares | Feb. 28, 2019 USD ($) $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2020 $ / shares shares
Class Of Stock [Line Items] |  |  |  |  |  |
Convertible preferred stock, issued |  |  |  |  | 118,766,273 | 0
Convertible preferred stock, par value | $ / shares |  |  |  |  | $ 0.001 | $ 0.001
Proceeds from issuance of series H preferred stock | $ |  |  |  |  | $ 10,000 |
Reverse stock split ratio |  | 0.1684664 |  |  |  |
Number of preferred stock converted into common stock | 20,090,745 |  |  |  |  |
Convertible preferred stock, outstanding |  |  |  |  | 118,766,273 | 0
Series H Convertible Preferred Stock |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Convertible preferred stock, issued |  |  | 8,695,621 | 8,695,621 |  |
Convertible preferred stock, par value | $ / shares |  |  | $ 1.15 | $ 1.15 |  |
Proceeds from issuance of series H preferred stock | $ |  |  | $ 10,000 | $ 10,000 |  |
Reverse stock split ratio | 0.1684664 |  |  |  |  |
Series A-1 Preferred Stock |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Reverse stock split ratio | 0.1684664 |  |  |  |  |
Series A2 Preferred Stock |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Reverse stock split ratio | 0.1684664 |  |  |  |  |
Series A3 Preferred Stock |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Reverse stock split ratio | 0.1684664 |  |  |  |  |
Series B Preferred Stock |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Reverse stock split ratio | 0.1684664 |  |  |  |  |
Series C Preferred Stock |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Reverse stock split ratio | 0.1684664 |  |  |  |  |
Series D Preferred Stock |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Reverse stock split ratio | 0.1684664 |  |  |  |  |
Series E Preferred Stock |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Reverse stock split ratio | 0.1684664 |  |  |  |  |
Series F Preferred Stock |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Reverse stock split ratio | 0.1684664 |  |  |  |  |
Series G Preferred Stock |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Reverse stock split ratio | 0.1684664 |  |  |  |  |
Series B1 Convertible Preferred Stock |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Reverse stock split ratio | 0.196 |  |  |  |  |

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- Definition The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition Per share amount of par value or stated value of stock classified as temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65877616&loc=d3e177068-122764 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (27) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The number of securities classified as temporary equity that have been sold (or granted) to the entity's shareholders. Securities issued include securities outstanding and securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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