Share-Based Payment Arrangements (Details 4) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 1,929,377	$ 1,466,183	$ 1,705,429
Restricted stock and restricted stock units
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	827,055	602,889	257,843
Restricted stock and restricted stock units | Directors, officers, and employees
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	827,055	602,889	257,843
Restricted stock and restricted stock units | Non-employee consultants
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 0	$ 0	$ 0