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Stockholders' Deficiency - Narrative (Details) - USD ($) |  |  | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 16, 2016 | Oct. 13, 2016 | Sep. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Sep. 02, 2016 | Dec. 31, 2015
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Capital units, authorized |  |  |  | 620,000,000 |  |  |
Common stock, shares authorized |  |  |  | 600,000,000 |  |  | 600,000,000
Preferred stock, shares authorized |  |  |  | 20,000,000 |  |  |
Exercise price of warrants |  |  |  |  |  | $ 2.29 |
Common Stock |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Issuance of common stock associated with rights offering, shares | 23,523,195 |  |  |  | 23,523,195 |  |
Equity Rights |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Equity offering | $ 35,300,000 |  |  |  |  |  |
Common Stock | Subscription Right |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Amount to be invested by each right to purchase securities (in dollars per share) | $ 0.65 |  |  |  |  |  |
Exercise price of warrants | $ 1.50 |  |  |  |  |  |
Class of warrant or right, exercise price of warrants or rights, volume of weighted average price during market hours, percentage | 85.00% |  |  |  |  |  |
Private Placement |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Backstop fee |  |  | $ 1,764,240 | $ 1,764,240 |  |  |
Private Placement | Common Stock |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Stock issued during period, shares, new issues |  | 708,530 |  |  |  |  |
MacAndrews & Forbes | Private Placement | Common Stock |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Stock issued during period, shares, new issues |  | 565,000 |  |  |  |  |

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