Investments (Tables)

9 Months Ended

Sep. 30, 2021

Investments

Summary of available-for-sale securities

	September 30, 2021
			Gross		Gross
			Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
U.S. corporate bonds	$	926,387	$	18,679	$	—	$	945,066

	December 31, 2020
			Gross		Gross
			Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
U.S. corporate bonds	$	1,863,382	$	45,986	$	—	$	1,909,368