Short-term Investments - Summary of Available-for-sale Securities (Details) - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale, Sale [Abstract]
Cost	$ 159,239,931
Gross Unrealized Gains	2,365,899
Gross Unrealized Losses	(690,895)
Fair Market Value	160,914,935
Mutual funds
Debt Securities, Available-for-sale, Sale [Abstract]
Cost	153,177,675	$ 66,599,219
Gross Unrealized Gains	2,339,639	754,709
Gross Unrealized Losses	(644,140)	(15,911)
Fair Market Value	154,873,174	$ 67,338,017
Certificates of deposit
Debt Securities, Available-for-sale, Sale [Abstract]
Cost	3,000,000
Gross Unrealized Gains	26,260
Gross Unrealized Losses	(10,000)
Fair Market Value	3,016,260
U.S. agency mortgage-backed securities
Debt Securities, Available-for-sale, Sale [Abstract]
Cost	3,062,256
Gross Unrealized Gains	0
Gross Unrealized Losses	(36,755)
Fair Market Value	$ 3,025,501
Maximum \| Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Contractual Maturity	1 year

Debt Securities, Available-for-sale contractual maturity.

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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