Loss Per Share of Common Stock (Details) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	6,524,971	4,750,187
Restricted stock
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	32,400	125,867
Stock options.
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	6,492,571	4,624,320