Available for Sale Securities (Tables)

6 Months Ended

Jun. 30, 2016

Investments Debt And Equity Securities [Abstract]

Summary of Available-for-sale Securities

The following is a summary of the Company’s available-for-sale securities at June 30, 2016 and December 31, 2015:  

	June 30, 2016
			Gross		Gross			Fair Value
	Amortized		Unrealized		Unrealized			(Net Carrying
	Cost		Gains		Losses			Amount)
U.S. Treasury securities and obligations of U.S. government    agencies	$	9,202,665	$	3,269	$	(38	)	$	9,205,896
Corporate securities		6,200,233		70		(785	)		6,199,518
Total available-for-sale securities	$	15,402,898	$	3,339	$	(823	)	$	15,405,414

	December 31, 2015
			Gross		Gross			Fair Value
	Amortized		Unrealized		Unrealized			(Net Carrying
	Cost		Gains		Losses			Amount)
U.S. Treasury securities and obligations of U.S. government    agencies	$	17,914,136	$	—	$	(26,744	)	$	17,887,392
Corporate securities		12,932,629		397		(15,010	)		12,918,016
Total available-for-sale securities	$	30,846,765	$	397	$	(41,754	)	$	30,805,408

Summary of Contractual Maturities of Debt Investment Securities

Contractual maturities of debt investment securities at June 30, 2016 are shown below.

	Under
	1 Year		1 to 2 Years		Total
U.S. Treasury securities and obligations of U.S. government    agencies	$	9,205,896	$	—	$	9,205,896
Corporate securities		6,199,518		—		6,199,518
Total available-for-sale securities	$	15,405,414	$	—	$	15,405,414

Summary of Debt Securities with Unrealized Losses

The following table shows the gross unrealized losses and fair values of the Company’s investments that have unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of June 30, 2016:

	Under 1 Year					1 to 2 Years				Total
			Gross					Gross				Gross
	Fair		Unrealized			Fair		Unrealized		Fair		Unrealized
	Value		Losses			Value		Losses		Value		Losses
U.S. Treasury securities and obligations of U.S.    government agencies	$	1,072,238	$	(38	)	$	—	$	—	$	1,072,238	$	(38	)
Corporate securities		2,511,219		(785	)		—		—	$	2,511,219		(785	)
Total available-for-sale securities with unrealized    losses	$	3,583,457	$	(823	)	$	—	$	—	$	3,583,457	$	(823	)