Investments (Tables)

9 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Summary of Available-for-Sale Investments by Security type

Available-for-sale investments by security type were as follows:

	Estimated Fair Value		Gross Unrealized Gains		Gross Unrealized Losses			Amortized Cost
At September 30, 2020:
U.S. Treasuries – Cash equivalents	$	94,992,100	$	—	$	(1,195	)	$	94,993,295
Bond Funds – ST		10,002,749		—		(5,276	)		10,008,025
Total	$	104,994,849	$	—	$	(6,471	)	$	105,001,320
At December 31, 2019:
U.S. Treasuries – Cash equivalents	$	59,932,200	$	2,042	$	—		$	59,930,158
U.S. Treasuries – ST		5,007,050		7,463		—			4,999,587
Total	$	64,939,250	$	9,505	$	—		$	64,929,745

Estimated Fair Values of Available for Sale Securities

The estimated fair values of available-for-sale securities at September 30, 2020, by contractual maturity, are summarized as follows:

	September 30, 2020
Due in one year or less	$	104,994,849