Net Loss Per Common Share - Dilutive Securities (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Antidilutive securities not included:
Antidilutive securities	2,934,737	3,660,868	2,934,737	3,660,868
Employee Stock Options
Antidilutive securities not included:
Antidilutive securities	2,567,017	1,583,521	2,567,017	1,583,521
Stock warrants
Antidilutive securities not included:
Antidilutive securities	310,220	326,553	310,220	326,553
Unvested restricted stock units
Antidilutive securities not included:
Antidilutive securities	57,500		57,500
Restricted Stock
Antidilutive securities not included:
Antidilutive securities		1,750,794		1,750,794