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Stockholders' Equity (Deficit) (Tables) | 6 Months Ended
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Jun. 30, 2021
Federal Home Loan Banks [Abstract] |
Summary of Preferred Stock Allocated to Investors | The Purchase Agreement provides for the Company to issue and sell to the Investor shares of the Company’s preferred stock in the amounts set forth in the following table (numbers have been adjusted for the February 2016 reverse stock split):
Convertible Preferred Stock |  | Shares |  |  | Price Per Share |  |  | Total Investment |
Series AA-1 |  |  | 8,427,004 |  |  | $ | 12.00 |  |  | $ | 101,124,048 |
Series AA-2 |  |  | 7,223,145 |  |  | $ | 6.00 |  |  |  | 43,338,870 |
|  |  | 15,650,149 |  |  |  |  |  |  | $ | 144,462,918 |

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