Subsequent Events (Details Textual) - USD ($)  | 
Oct. 19, 2017  | 
Oct. 16, 2017  | 
Sep. 30, 2016  | 
|---|---|---|---|
| Shares Issued, Price Per Share | $ 6.44 | ||
| Subsequent Event [Member] | |||
| Stock Issued During Period, Shares, New Issues | 5,750,000 | ||
| Stock Issued During Period, Value, New Issues | $ 92,000,000 | ||
| Shares Issued, Price Per Share | $ 16.00 | ||
| Grants Receivable | $ 13,850,000 | 
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- Definition Carrying amount as of the balance sheet date of amounts due under the terms of governmental, corporate, or foundation grants. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Per share or per unit amount of equity securities issued. No definition available. 
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- Definition Number of new stock issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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