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Convertible Preferred Stock - Additional Information (Details) - Series A Preferred Stock - USD ($) |  | 6 Months Ended | 8 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 31, 2020 | Jun. 30, 2021 | Aug. 31, 2020 | Dec. 31, 2020 | May 07, 2018
Class Of Stock [Line Items] |  |  |  |  |
Preferred stock shares issued |  | 9,993,727 | 7,048,351 | 9,993,727 |
Shares issued price per share |  | $ 3.5833 | $ 3.5833 |  |
Proceeds from issuance of convertible preferred stock |  | $ 35,000,000.0 | $ 25,300,000 |  |
Preferred stock, per share |  |  | $ 0.0001 |  |
Preferred stock shares outstanding |  | 9,993,727 |  | 9,993,727 |
Warrants issued to purchase stock |  | 231,396 |  |  |
Preferred stock shares, authorized |  |  | 27,564,260 |  |
Dividends payable, amount, per share |  | $ 0.2866 |  |  |
Preferred stock, liquidation preference per share |  | 3.5833 |  |  |
Preferred stock, redemption price, per share |  | $ 3.92361 |  |  |
Aggregate indebtedness |  | $ 2,000,000,000 |  |  |
Share conversion price per share |  | $ 3.5833 | $ 3.2583 |  |
Beneficial conversion charge |  | $ 0 |  |  |
Series A Preferred Stock Warrants |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Warrants issued to purchase stock |  |  |  |  | 231,396
Exercise price per unit of warrants | $ 0.0003 |  |  |  | $ 0.0003
Warrants and outstanding, term |  |  |  |  | 5 years
Warrants maturity date |  |  |  |  | May 30, 2023
Payments for settlement of warrants | $ 800,000 |  |  |  |
Minimum |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Preferred stock shares outstanding |  | 131,400 |  |  |
Minimum | Series A Stockholders |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Shareholder consent |  | 60.00% |  |  |
Minimum | Board Of Directors |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Shareholder consent |  | 60.00% |  |  |

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- Definition Minimum amount of net capital required to be maintained by broker-dealer and its subsidiary, calculated under Aggregate Indebtedness Standard. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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