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Loss per Common Share - Summary of Potentially Dilutive Securities (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Outstanding stock option
Anti-dilutive securities
Potentially dilutive securities excluded from the computations of diluted weighted-average shares outstanding	4,190,116	3,665,459	4,190,116	3,665,459
Warrants
Anti-dilutive securities
Potentially dilutive securities excluded from the computations of diluted weighted-average shares outstanding	1,041,667		1,041,667
Unvested restricted stock
Anti-dilutive securities
Potentially dilutive securities excluded from the computations of diluted weighted-average shares outstanding		12,072		12,072
Restricted stock units
Anti-dilutive securities
Potentially dilutive securities excluded from the computations of diluted weighted-average shares outstanding	892,237	522,190	892,237	522,190
Performance share units
Anti-dilutive securities
Potentially dilutive securities excluded from the computations of diluted weighted-average shares outstanding	99,400		99,400

X

- 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://fasb.org/us-gaap/role/ref/legacyRef
-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

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- Definition

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+ References

No definition available.

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