Available for Sale Securities (Tables)

9 Months Ended

Sep. 30, 2015

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 September 30, 2015:  

			Gross		Gross			Fair Value
	Amortized		Unrealized		Unrealized			(Net Carrying
	Cost		Gains		Losses			Amount)
US Treasury securities and obligations of US    government agencies	$	18,015,477	$	8,712	$	—		$	18,024,189
Corporate securities		18,458,480		1,179		(5,137	)		18,454,522
Total available-for-sale securities	$	36,473,957	$	9,891	$	(5,137	)	$	36,478,711

Summary of Contractual Maturities of Debt Investment Securities

Contractual maturities of debt investment securities at September 30, 2015, are shown below.

	Under
	1 Year		1 to 2 Years		Total
US Treasury securities and obligations of US    government agencies	$	13,085,633	$	4,938,556	$	18,024,189
Corporate securities		15,626,126		2,828,396		18,454,522
Total available-for-sale securities	$	28,711,759	$	7,766,952	$	36,478,711

Summary of Debt Securities with Unrealized Losses

The following tables 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 September 30, 2015:

	Under 1 Year				1 to 2 Years				Total
			Gross				Gross				Gross
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
Corporate securities	$	3,430,702	$	5,137	$	—	$	—	$	3,430,702	$	5,137
Total available-for-sale securities with unrealized    losses	$	3,430,702	$	5,137	$	—	$	—	$	3,430,702	$	5,137