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Net (Loss) Income per Share Attributable to Common Stock - Stock Options and Restricted Stock (Details) - shares | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2014
Weighted Average |  |  |  |
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share |  |  |  |
Weighted average number of securities excluded from calculation | 226,839 | 756,527 | 552,577 | 195,480
Restricted stock |  |  |  |
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share |  |  |  |
Weighted average participating restricted stock included in common stock outstanding |  | 87,000 |  |
Restricted stock | Weighted Average |  |  |  |
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share |  |  |  |
Weighted average participating restricted stock included in common stock outstanding | 182,160 |  |  | 182,160
Unvested stock options | Weighted Average |  |  |  |
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share |  |  |  |
Weighted average number of securities excluded from calculation | 160,434 | 411,763 | 425,981 | 162,107
Restricted stock units | Weighted Average |  |  |  |
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share |  |  |  |
Weighted average number of securities excluded from calculation | 66,405 | 268,461 | 126,596 | 33,373
Non-participating restricted stock awards | Weighted Average |  |  |  |
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share |  |  |  |
Weighted average number of securities excluded from calculation |  | 76,303 |  |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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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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