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Short-term Investments and Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020
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Financial assets and liabilities that are measured at fair value on recurring basis |  |
Short-term investments | $ 330,170,940 | $ 160,914,935
Mutual funds |  |
Financial assets and liabilities that are measured at fair value on recurring basis |  |
Short-term investments | 191,439,430 | 154,873,174
Commercial paper |  |
Financial assets and liabilities that are measured at fair value on recurring basis |  |
Short-term investments | 39,967,853 |
Certificates of deposit |  |
Financial assets and liabilities that are measured at fair value on recurring basis |  |
Short-term investments | 2,991,490 | 3,016,260
U.S. agency mortgage-backed securities |  |
Financial assets and liabilities that are measured at fair value on recurring basis |  |
Short-term investments | 1,588,647 | 3,025,501
Fair Value, Measurements, Recurring |  |
Financial assets and liabilities that are measured at fair value on recurring basis |  |
Short-term investments | 330,170,940 | 160,914,935
Investments in affiliated entity | 3,906,796 | 4,460,366
Total assets measured at fair value | 334,077,736 | 225,372,101
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets (Level 1) |  |
Financial assets and liabilities that are measured at fair value on recurring basis |  |
Short-term investments | 285,622,950 | 154,873,174
Investments in affiliated entity | 3,906,796 | 4,460,366
Total assets measured at fair value | 289,529,746 | 219,330,340
Fair Value, Measurements, Recurring | Significant Other Unobservable Inputs (Level 2) |  |
Financial assets and liabilities that are measured at fair value on recurring basis |  |
Short-term investments | 44,547,990 | 6,041,761
Investments in affiliated entity | 0 | 0
Total assets measured at fair value | 44,547,990 | 6,041,761
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) |  |
Financial assets and liabilities that are measured at fair value on recurring basis |  |
Short-term investments | 0 | 0
Investments 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 |  |
Short-term investments | 191,439,430 | 154,873,174
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 |  |
Short-term investments | 191,439,430 | 154,873,174
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 |  |
Short-term investments | 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 |  |
Short-term investments | 0 | 0
Fair Value, Measurements, Recurring | U.S. treasury securities |  |
Financial assets and liabilities that are measured at fair value on recurring basis |  |
Cash and cash equivalents |  | 59,996,800
Short-term investments | 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 |  |
Cash and cash equivalents |  | 59,996,800
Short-term investments | 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 |  |
Cash and cash equivalents |  | 0
Short-term investments | 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 |  |
Cash and cash equivalents |  | 0
Short-term investments | 0 |
Fair Value, Measurements, Recurring | Commercial paper |  |
Financial assets and liabilities that are measured at fair value on recurring basis |  |
Short-term investments | 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 |  |
Short-term investments | 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 |  |
Short-term investments | 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 |  |
Short-term investments | 0 |
Fair Value, Measurements, Recurring | Certificates of deposit |  |
Financial assets and liabilities that are measured at fair value on recurring basis |  |
Short-term investments | 2,991,490 | 3,016,260
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 |  |
Short-term investments | 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 |  |
Short-term investments | 2,991,490 | 3,016,260
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 |  |
Short-term investments | 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 |  |
Short-term investments | 1,588,647 | 3,025,501
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 |  |
Short-term investments | 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 |  |
Short-term investments | 1,588,647 | 3,025,501
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 |  |
Short-term investments | $ 0 | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition 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 -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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