Loss Per Share of Common Stock (Details) - shares	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	6,650,971	4,858,976
Restricted stock
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	32,400	117,867
Stock options.
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	6,618,571	4,741,109