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Short-Term Investments (Tables) | 12 Months Ended
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Dec. 31, 2021
Investments Debt And Equity Securities [Abstract] |
Summary of Short-Term Investments by Significant Investment Category | The Company’s short-term investments by significant investment category as of December 31, 2021, are as follows:
Description |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Accrued Interest |  |  | Estimated Fair Value |
Level 1: (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash alternatives |  | $ | 2,172,853 |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | 2,172,853 |
Certificates of deposit |  |  | 591,968 |  |  |  | - |  |  |  | 3,294 |  |  |  | 1,222 |  |  |  | 589,896 |
Corporate bonds and notes |  |  | 4,293,722 |  |  |  | - |  |  |  | 5,432 |  |  |  | 46,820 |  |  |  | 4,335,110 |
Municipal Securities |  |  | 7,411,043 |  |  |  | - |  |  |  | 2,334 |  |  |  | 29,182 |  |  |  | 7,437,891 |
|  | $ | 14,469,586 |  |  | $ | - |  |  | $ | 11,060 |  |  | $ | 77,224 |  |  | $ | 14,535,750 |
(1) | Level 1 fair value estimates are based on quoted prices in active markets for identical assets or liabilities. |

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- Definition Tabular disclosure 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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