Loss Per Share of Common Stock (Details) - shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	4,858,976	3,318,136
Restricted stock
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	117,867	409,300
Stock options.
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	4,741,109	2,908,836