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Description of Business (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jul. 18, 2017 | Jul. 12, 2017 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Corporate Information, Status of Operations and Management Plans |  |  |  |  |  |  |
Changes in fair value of contingent consideration payable |  |  | $ 244,250 | $ 4,110 | $ 238,622 | $ (9,228) |
Contingent consideration payable |  |  | 21,100 |  | 21,100 |  | $ 269,722
Loss on impairment |  |  | 465,427 |  | 465,427 |  |
Net proceeds from the issuance of common stock |  |  |  |  | 243,036 | $ 97,068 |
SD-101 |  |  |  |  |  |  |
Corporate Information, Status of Operations and Management Plans |  |  |  |  |  |  |
Loss on impairment related to fixed assets |  |  |  |  | 1,700 |  |
Changes in fair value of contingent consideration payable |  |  | 254,700 |  |  |  |
Contingent consideration payable |  |  | $ 0 |  | 0 |  |
Selling, general and administrative costs due to wind-down |  |  |  |  | 400 |  |
Research and development expenses due to wind-down |  |  |  |  | 8,100 |  |
Common Stock |  |  |  |  |  |  |
Corporate Information, Status of Operations and Management Plans |  |  |  |  |  |  |
Number of common stock issued from underwriting agreement |  | 21,122,449 |  |  |  |  |
Price per share of common stock issued (in dollars per share) |  | $ 12.25 |  |  |  |  |
Gross proceeds from issue of common stock before deducting underwriting discounts and commissions |  | $ 258,800 |  |  |  |  |
Net proceeds from the issuance of common stock | $ 243,000 |  |  |  | 243,000 |  |
IPR&D |  |  |  |  |  |  |
Corporate Information, Status of Operations and Management Plans |  |  |  |  |  |  |
Loss on impairment of intangible assets |  |  |  |  | 463,700 |  |
IPR&D | SD-101 |  |  |  |  |  |  |
Corporate Information, Status of Operations and Management Plans |  |  |  |  |  |  |
Loss on impairment of intangible assets |  |  |  |  | $ 463,700 |  |

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