Available for Sale Securities - Summary of Contractual Maturities of Debt Investment Securities (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Schedule Of Available For Sale Securities [Line Items]
Under 1 Year	$ 11,097,140
Fair Value (Net Carrying Amount)	11,097,140	$ 30,805,408
U.S. Treasury Securities and Obligations of U.S. Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Under 1 Year	4,885,970
Fair Value (Net Carrying Amount)	4,885,970	17,887,392
Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Under 1 Year	6,211,170
Fair Value (Net Carrying Amount)	$ 6,211,170	$ 12,918,016