Available for Sale Securities (Tables)

12 Months Ended

Dec. 31, 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 December 31, 2016:

	December 31, 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	$	1,300,151	$	512	$	—		$	1,300,663
Corporate debt securities		3,005,840		—		(1,602	)		3,004,238
Total available-for-sale securities	$	4,305,991	$	512	$	(1,602	)	$	4,304,901

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

	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 debt 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 December 31, 2016 are shown below.

	2016
Maturing in one year or less	$	4,304,901
Maturing in one to three years		—
Total available-for-sale securities	$	4,304,901

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 December 31, 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	$	—	$	—		$	—	$	—	$	—	$	—
Corporate debt securities		1,304,738		(1,602	)		—		—		1,304,738		(1,602	)
Total available-for-sale securities with unrealized    losses	$	1,304,738	$	(1,602	)	$	—	$	—	$	1,304,738	$	(1,602	)