Stock-based Compensation - Unrecognized Expense (Details)	9 Months Ended
	Sep. 30, 2016 USD ($)
Unrecognized stock-based compensation expense
Unrecognized stock compensation expense	$ 6,367,120
Weighted average remaining period (in years)	2 years 7 months 2 days
Stock options
Unrecognized stock-based compensation expense
Unrecognized stock compensation expense	$ 4,868,528
Weighted average remaining period (in years)	2 years 6 months 22 days
Restricted Stock [Member]
Unrecognized stock-based compensation expense
Unrecognized stock compensation expense	$ 1,498,592
Weighted average remaining period (in years)	2 years 8 months 5 days