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Short-term Investments (Tables)

3 Months Ended

Mar. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of Summary of Investments

The following is a summary of available-for-sale securities as of March 31, 2021 and December 31, 2020:


									As of March 31, 2021
			Contractual Maturity (in years)						Cost						Gross Unrealized Gains						Gross Unrealized Losses						Fair Market Value
Mutual funds			---						$	228,101,615					$	1,562,498					$	(714,957)					$	228,949,156
U.S. treasury securities			Less than 1						200,408,976						14,404						(9,380)						200,414,000

Certificates of deposit			Less than 1						2,977,623						19,700						(5,123)						2,992,200
U.S. agency mortgage-backed securities			*						2,646,077						1,100						(33,005)						2,614,172

									$	434,134,291					$	1,597,702					$	(762,465)					$	434,969,528


									As of December 31, 2020
			Contractual Maturity (in years)						Cost						Gross Unrealized Gains						Gross Unrealized Losses						Fair Market Value
Mutual funds			---						$	153,177,675					$	2,339,639					$	(644,140)					$	154,873,174
Certificates of deposit			Less than 1						3,000,000						26,260						(10,000)						3,016,260
U.S. agency mortgage-backed securities			*						3,062,256						—						(36,755)						3,025,501


Total investments									$	159,239,931					$	2,365,899					$	(690,895)					$	160,914,935

*No single maturity date.