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Subsequent Events - Additional Information (Details) $ / shares in Units, $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 08, 2020 USD ($) Director | Mar. 11, 2020 USD ($) $ / shares shares | Jan. 01, 2020 shares | Feb. 29, 2020 $ / shares shares | Mar. 23, 2020 USD ($) | Dec. 31, 2019 $ / shares | Jun. 06, 2019 USD ($) | Dec. 31, 2018 USD ($) $ / shares | May 31, 2018 USD ($)
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Outstanding balance to vendor |  |  |  |  |  |  |  |  | $ 2.1
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  |  | $ 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 | shares |  |  |  | 2,717 |  |  |  |  |
Subsequent Event [Member] | Proposed Offering [Member] |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  | $ 0.01 |  |  |  |  |
Number of trading days required to measure weighted average price of common stock |  | 5 days |  |  |  |  |  |  |
Proposed Offering Amount | $ 4.0 |  |  |  |  |  |  |  |
Maximum Number Of Directors Investor Can Remove Or Replace | Director | 2 |  |  |  |  |  |  |  |
Minimum Required Investment Percentage For Investors Option | 9.99% |  |  |  |  |  |  |  |
Maximum Number Of Directors | Director | 8 |  |  |  |  |  |  |  |
Minimum Number Of Directors | Director | 6 |  |  |  |  |  |  |  |
Minimum Number Of Directors Investor Has Option To Nominate | Director | 1 |  |  |  |  |  |  |  |
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 | shares |  | 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 | shares |  | 221,000 |  |  |  |  |  |  |
Series E and E1 Convertible Preferred Stock [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Convertible preferred stock, shares upon Conversion | shares |  |  | 2,915 |  |  |  |  |  |
Series E Preferred Stock [Member] | Subsequent Event [Member] | Proposed Offering [Member] | Rosalind [Member] |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Conversion price | $ / shares |  | $ 1,500 |  |  |  |  |  |  |

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