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Short-term Investments and Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	$ 301,384,357	$ 330,170,940
Mutual funds
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	172,280,734	191,439,430
Commercial paper
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	39,986,103	39,967,853
Certificates of deposit
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	2,991,347	2,991,490
U.S. agency mortgage-backed securities
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	1,461,623	1,588,647
Fair Value, Measurements, Recurring
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	301,384,357	330,170,940
Investment in affiliated entity	3,369,068	3,906,796
Total assets measured at fair value	304,753,425	334,077,736
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets (Level 1)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	256,945,284	285,622,950
Investment in affiliated entity	3,369,068	3,906,796
Total assets measured at fair value	260,314,352	289,529,746
Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs (Level 2)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	44,439,073	44,547,990
Investment in affiliated entity	0	0
Total assets measured at fair value	44,439,073	44,547,990
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	0	0
Investment in affiliated entity	0	0
Total assets measured at fair value	0	0
Fair Value, Measurements, Recurring | Mutual funds
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	172,280,734	191,439,430
Fair Value, Measurements, Recurring | Mutual funds | Quoted Prices in Active Markets (Level 1)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	172,280,734	191,439,430
Fair Value, Measurements, Recurring | Mutual funds | Significant Other Unobservable Inputs (Level 2)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring | Mutual funds | Significant Unobservable Inputs (Level 3)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring | U.S. treasury securities
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	84,664,550	94,183,520
Fair Value, Measurements, Recurring | U.S. treasury securities | Quoted Prices in Active Markets (Level 1)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	84,664,550	94,183,520
Fair Value, Measurements, Recurring | U.S. treasury securities | Significant Other Unobservable Inputs (Level 2)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring | U.S. treasury securities | Significant Unobservable Inputs (Level 3)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring | Commercial paper
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	39,986,103	39,967,853
Fair Value, Measurements, Recurring | Commercial paper | Quoted Prices in Active Markets (Level 1)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring | Commercial paper | Significant Other Unobservable Inputs (Level 2)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	39,986,103	39,967,853
Fair Value, Measurements, Recurring | Commercial paper | Significant Unobservable Inputs (Level 3)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring | Certificates of deposit
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	2,991,347	2,991,490
Fair Value, Measurements, Recurring | Certificates of deposit | Quoted Prices in Active Markets (Level 1)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring | Certificates of deposit | Significant Other Unobservable Inputs (Level 2)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	2,991,347	2,991,490
Fair Value, Measurements, Recurring | Certificates of deposit | Significant Unobservable Inputs (Level 3)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring | U.S. agency mortgage-backed securities
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	1,461,623	1,588,647
Fair Value, Measurements, Recurring | U.S. agency mortgage-backed securities | Quoted Prices in Active Markets (Level 1)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	0	0
Fair Value, Measurements, Recurring | U.S. agency mortgage-backed securities | Significant Other Unobservable Inputs (Level 2)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	1,461,623	1,588,647
Fair Value, Measurements, Recurring | U.S. agency mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	$ 0	$ 0

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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