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Short-term Investments and Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	$ 142,212,907	$ 206,669,397
Mutual funds
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	60,108,322	107,662,718
Certificates of deposit
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	2,990,620	2,990,908
U.S. agency mortgage-backed securities
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	968,975	1,051,261
Fair Value, Measurements, Recurring
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	142,212,907	206,669,397
Investment in affiliated entity	2,780,526	2,007,142
Total assets measured at fair value	144,993,433	208,676,539
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	138,253,312	202,627,228
Investment in affiliated entity	2,780,526	2,007,142
Total assets measured at fair value	141,033,838	204,634,370
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	3,959,595	4,042,169
Investment in affiliated entity	0	0
Total assets measured at fair value	3,959,595	4,042,169
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	60,108,322	107,662,718
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	60,108,322	107,662,718
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	78,144,990	94,964,510
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	78,144,990	94,964,510
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 | Certificates of deposit
Financial assets and liabilities that are measured at fair value on recurring basis
Debt securities, available for sale	2,990,620	2,990,908
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	2,990,620	2,990,908
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	968,975	1,051,261
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	968,975	1,051,261
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

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