Loss Per Share of Common Stock (Details) - shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	4,949,976	3,150,561
Restricted stock
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	117,867	239,800
Stock options.
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	4,832,109	2,910,761