Loss per Common Share - Summary of Potentially Dilutive Securities (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Outstanding stock option
Anti-dilutive securities
Potentially dilutive securities excluded from the computations of diluted weighted-average shares outstanding	4,140,629	3,693,400	4,140,629	3,693,400
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		7,545		7,545
Restricted stock units
Anti-dilutive securities
Potentially dilutive securities excluded from the computations of diluted weighted-average shares outstanding	868,075	532,787	868,075	532,787
Performance share units
Anti-dilutive securities
Potentially dilutive securities excluded from the computations of diluted weighted-average shares outstanding	99,400		99,400