Available-for-Sale Securities (Tables)

9 Months Ended

Sep. 30, 2019

Investments Debt And Equity Securities [Abstract]

Summary of Available-for-sale Securities

The Company’s portfolio of available-for-sale securities consists of U.S. Treasuries and high credit quality corporate debt securities. The following is a summary of the Company’s available-for-sale securities at September 30, 2019 and December 31, 2018:  

	September 30, 2019
			Gross		Gross		Fair Value
	Amortized		Unrealized		Unrealized		(Net Carrying
	Cost		Gains		Losses		Amount)
Corporate debt securities		3,037,393		—		—		3,037,393
Total available-for-sale securities	$	3,037,393	$	—	$	—	$	3,037,393

	December 31, 2018
			Gross		Gross			Fair Value
	Amortized		Unrealized		Unrealized			(Net Carrying
	Cost		Gains		Losses			Amount)
U.S. Treasury securities	$	6,032,844	$	—	$	(1,329	)	$	6,031,515
Corporate debt securities		16,650,513		—		(979	)		16,649,534
Total available-for-sale securities	$	22,683,357	$	—	$	(2,308	)	$	22,681,049

Summary of Contractual Maturities of Debt Investment Securities

Contractual maturities of debt investment securities at September 30, 2019 are shown below.

	Under
	1 Year		1 to 2 Years		Total
Corporate debt securities		3,037,393				3,037,393
Total available-for-sale securities	$	3,037,393	$	—	$	3,037,393