Investments (Tables)

9 Months Ended

Sep. 30, 2020

Investments

Summary of available-for-sale securities

	September 30, 2020
			Gross		Gross
			Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
U.S. corporate bonds	$	2,258,686	$	61,721	$	—	$	2,320,407

	December 31, 2019
			Gross		Gross
			Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Corporate bonds:
U.S. corporations	$	2,258,686	$	29,123	$	—	$	2,287,809
International corporations		471,139		9,339		—		480,478
Total	$	2,729,825	$	38,462	$	—	$	2,768,287