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v3.20.1

Subsequent Events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 1 Months Ended | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 11, 2020 | Jan. 01, 2020 | Feb. 29, 2020 | Mar. 23, 2020 | Dec. 31, 2019 | Jun. 06, 2019 | Dec. 31, 2018 | May 31, 2018
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Outstanding balance to vendor |  |  |  |  |  |  |  | $ 2.1
Common stock, par value (in dollars per share) |  |  |  |  | $ 0.01 |  | $ 0.01 |
Principal |  |  |  |  |  |  | $ 4.5 |
Senior Secured Promissory Notes [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  | 8.00% |  |
Principal |  |  |  |  |  | $ 2.0 |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Remaining balance payment to vendor |  |  |  | $ 0.9 |  |  |  |
Issue of restricted common stock for advisory services |  |  | 2,717 |  |  |  |  |
Subsequent Event [Member] | Proposed Offering [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) |  |  | $ 0.01 |  |  |  |  |
Number of trading days required to measure weighted average price of common stock | 5 days |  |  |  |  |  |  |
Subsequent Event [Member] | Proposed Offering [Member] | Rosalind [Member] | Senior Secured Promissory Notes [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Interest rate | 8.00% |  |  |  |  |  |  |
Principal | $ 2.0 |  |  |  |  |  |  |
Subsequent Event [Member] | Proposed Offering [Member] | Executive Officer [Member] | Deferred Bonus [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Unregistered shares of common stock | 765,000 |  |  |  |  |  |  |
Subsequent Event [Member] | Proposed Offering [Member] | 2019 Annual Incentive Bonuses [Member] | Executive Officer [Member] | Support and Conversion Agreement [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Unregistered shares of common stock | 221,000 |  |  |  |  |  |  |
Series E and E1 Convertible Preferred Stock [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Convertible preferred stock, shares upon Conversion |  | 2,915 |  |  |  |  |  |
Series E Preferred Stock [Member] | Subsequent Event [Member] | Proposed Offering [Member] | Rosalind [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Conversion price | $ 1,500 |  |  |  |  |  |  |

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