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Net (Loss) Income per Share Attributable to Common Stock - Unvested Restricted Stock (Details) - shares | Dec. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Sep. 30, 2013
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Restricted Stock Awards | Weighted Average |  |  |  |
Net Loss Per Share Attributable To Common Stock |  |  |  |
Weighted average unvested restricted stock included in common stock outstanding | 46,695 | 182,160 | 182,160 | 182,160

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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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