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v3.20.1

Corporate Conversion and Equity - Additional Information (Details) |  | 12 Months Ended | 18 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 20, 2018 USD ($) Unit | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 $ / shares shares | Dec. 31, 2017 USD ($) $ / shares shares | Dec. 31, 2019 USD ($) Vote $ / shares shares | Jun. 30, 2018 $ / shares | Jun. 21, 2018 $ / shares shares | Mar. 31, 2018 shares
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, shares authorized |  | 500,000,000 | 500,000,000 |  | 500,000,000 |  | 500,000,000 |
Preferred stock, shares authorized |  | 10,000,000 | 10,000,000 |  | 10,000,000 |  | 10,000,000 |
Common stock, par value | $ / shares |  | $ 0.001 | $ 0.001 |  | $ 0.001 |  | $ 0.001 |
Preferred stock, par value | $ / shares |  | $ 0.001 | $ 0.001 |  | $ 0.001 |  | $ 0.001 |
Common stock, shares issued |  | 29,835,183 | 29,450,035 |  | 29,835,183 |  |  |
Preferred stock, shares issued |  | 0 | 0 |  | 0 |  | 0 |
Number of classes of units permitted for issuance | Unit | 4 |  |  |  |  |  |  |
Number of vote each member is entitled to for each unit held | Vote |  |  |  |  | 1 |  |  |
Warrants issued to purchase of stock |  |  |  |  |  |  |  | 7,739,092
Financial Advisors |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Warrants to purchase common stock |  |  |  | 101,119 |  |  |  |
Exercise price of warrants | $ / shares |  |  |  | $ 12.60 |  |  |  |
Purchasers of Bridge Notes |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Warrants to purchase common stock |  |  |  |  |  |  | 429,948 |
Exercise price of warrants | $ / shares |  |  |  |  |  |  | $ 12.60 |
Series A Preferred Units |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Accrued and unpaid preferred return payable | $ |  | $ 3,600,000 |  |  | $ 3,600,000 |  |  |
Total convertible preferred units | $ | $ 54,923,430 |  |  | $ 53,518,463 |  |  |  |
Preferred return percentage |  | 4.00% |  |  |  |  |  |
Reduction in preferred return percentage |  | 2.00% |  |  |  |  |  |
Stock split, conversion ratio |  | 0.05556 |  |  |  |  |  |
Warrants issued to purchase of stock |  |  | 0 |  |  |  |  |
Series A Preferred Units | December 2015 Term Loan | Financial Advisors |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Warrants issued to purchase of stock |  |  | 221,766 |  |  |  |  |
Series B Preferred Units |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Total convertible preferred units | $ |  |  |  | 68,755,544 |  |  |  |
Stock split, conversion ratio |  | 0.05556 |  |  |  |  |  |
Series B Preferred Units | Purchase Agreement |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Proceeds from issuance of preferred stock | $ |  |  |  | 46,911,300 |  |  |  |
Aggregate amount of bridge notes and related accrued and unpaid interest | $ |  |  |  | 73,630,210 |  |  |  |
Aggregate amount of bridge notes and related accrued and unpaid interest | $ |  |  |  | 73,630,210 |  |  |  |
Series B Preferred Units | Promissory Notes | Purchase Agreement |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Bridge note converted amount | $ |  |  |  | $ 26,718,910 |  |  |  |
Common Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Units converted into common stock shares |  |  |  |  | 23,470,035 |  |  |
Preferred return payable upon public offering | $ | $ 3,629,092 |  |  |  |  |  |  |
Warrants issued to purchase of stock |  | 35,452,084 |  |  | 35,452,084 |  |  |
Exercise price of warrants | $ / shares |  | $ 1.25 |  |  | $ 1.25 |  |  |
Common Stock | Advisors |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Warrants issued to purchase of stock |  |  |  |  |  |  | 2,724,549 |
Warrants to purchase common stock |  |  |  |  |  |  | 151,364 |
Exercise price of warrants | $ / shares |  |  |  |  |  |  | $ 12.60 |
Common Stock | Advisors | Exercise Price One |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Warrants issued to purchase of stock |  | 2,724,549 |  |  | 2,724,549 |  |  |
Exercise price of warrants | $ / shares |  | $ 0.70 |  |  | $ 0.70 |  |  |
Common Stock | Advisors | Exercise Price Two |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Warrants issued to purchase of stock |  | 72,000 |  |  | 72,000 |  |  |
Exercise price of warrants | $ / shares |  | $ 1.25 |  |  | $ 1.25 |  |  |
Common Stock | Profits Interests |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Units converted into common stock shares |  | 1,345,231 | 1,345,231 |  | 1,345,231 |  |  |
Options to purchase common stock shares |  | 2,141,748 |  |  |  |  |  |
Options to purchase common stock shares, exercise price | $ / shares |  | $ 15.00 |  |  | $ 15.00 |  |  |
Common Stock | Common Units |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Units converted into common stock shares |  |  |  |  | 12,099,280 |  |  |
Common Stock | Series A Preferred Units |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Units converted into common stock shares |  |  |  |  | 4,181,856 |  |  |
Common stock shares issued as payment in full for accrued and unpaid preferred return payable |  | 241,939 |  |  | 241,939 |  |  |
Common Stock | Series B Preferred Units |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Units converted into common stock shares |  |  |  |  | 5,843,668 |  |  |
IPO |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, shares issued |  |  |  |  |  |  | 29,450,035 |
IPO | Common Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Options to purchase common stock shares, exercise price | $ / shares |  |  |  |  |  | $ 15.00 |  |
IPO | Common Stock | Profits Interests |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Units converted into common stock shares |  | 62,765,605 |  |  |  |  |  |
IPO | Common Stock | Series A Warrants |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Warrants to purchase common stock |  |  | 12,321 |  |  |  |  |
Exercise price of warrants | $ / shares |  |  | $ 15.30 |  |  |  |  |

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