Stock-based Compensation - Unrecognized Expense (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)
Unrecognized stock-based compensation expense
Unrecognized stock compensation expense	$ 5,800,598
Weighted average remaining period (in years)	2 years 4 months 21 days
Stock options
Unrecognized stock-based compensation expense
Unrecognized stock compensation expense	$ 4,442,827
Weighted average remaining period (in years)	2 years 4 months 13 days
Restricted stock
Unrecognized stock-based compensation expense
Unrecognized stock compensation expense	$ 1,357,771
Weighted average remaining period (in years)	2 years 5 months 9 days