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Stockholders' Equity - Series D Convertible Preferred Stock (Details) - USD ($) |  |  |  | 1 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 15, 2020 | May 08, 2020 | Jan. 25, 2019 | Jun. 30, 2020 | Apr. 30, 2019 | Sep. 30, 2020 | Dec. 31, 2019
Class of Stock [Line Items] |  |  |  |  |  |  |
Number of shares called by warrants (in shares) | 2,213,115 |  |  |  |  |  |
Exercise price of warrants (in USD per share) | $ 3.05 |  |  |  |  |  |
Shares issued upon conversion (in shares) |  |  |  | 1,546,700 | 333,333 |  |
Service receivable |  |  | $ 1,675,000 |  |  | $ 2,403,580 | $ 971,673
Deemed dividend recognized for beneficial conversion features of Convertible Preferred Stock issuance | $ 2,700,000 |  |  |  |  |  |
Series D Convertible Preferred Stock |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Shares converted (in shares) |  |  |  | 154,670 |  |  |
Service receivable |  | $ 2,300,000 |  |  |  |  |
Deemed dividend recognized for beneficial conversion features of Convertible Preferred Stock issuance |  | 600,000 |  |  |  |  |
Private Placement |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Amount financed under agreement |  | $ 2,300,000 | $ 1,675,000 |  |  |  |
Number of shares called by warrants (in shares) |  | 859,813 |  |  |  |  |
Exercise price of warrants (in USD per share) |  | $ 1.50 | $ 3.762 |  |  |  |
Private Placement | Common Stock |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Shares of common stock issued (in shares) |  | 602,833 | 183,334 |  |  |  |
Private Placement | Series D Convertible Preferred Stock |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Shares of common stock issued (in shares) |  | 154,670 |  |  |  |  |

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