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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables) | 9 Months Ended
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Sep. 30, 2021
FAIR VALUE OF FINANCIAL INSTRUMENTS |
Summary of value of assets designated as investments in debt and equity securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2021
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Equity securities | ​ | $ | 9,357,931 | ​ | $ | — | ​ | $ | — | ​ | $ | 9,357,931
Mutual funds and exchange traded funds | ​ | ​ | 4,150,405 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,150,405
Certificates of deposit | ​ |  | — | ​ |  | 75,607 | ​ |  | — | ​ |  | 75,607
​ | ​ | $ | 13,508,336 | ​ | $ | 75,607 | ​ | $ | — | ​ | $ | 13,583,943
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Equity securities | ​ | $ | 3,990,533 | ​ | $ | — | ​ | $ | — | ​ | $ | 3,990,533
Mutual funds and exchange traded funds | ​ | ​ | 4,013,956 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 4,013,956
Certificates of deposit | ​ |  | — | ​ |  | 77,344 | ​ |  | — | ​ |  | 77,344
​ | ​ | $ | 8,004,489 | ​ | $ | 77,344 | ​ | $ | — | ​ | $ | 8,081,833
Schedule of unrealized gains (losses) on investments in equity securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2021
​ | ​ | ​ | ​ | ​ | Gross Unrealized | ​ | Aggregate
​ |  | Cost |  | Gains |  | Losses |  | Fair Value
Equity securities | ​ | $ | 6,698,032 | ​ | $ | 2,659,899 | ​ | $ | — | ​ | $ | 9,357,931
Mutual funds and exchange traded funds | ​ | ​ | 3,994,001 | ​ | ​ | 156,404 | ​ | ​ | — | ​ | ​ | 4,150,405
Certificates of deposit | ​ |  | 75,000 | ​ |  | 607 | ​ |  | — | ​ |  | 75,607
​ | ​ | $ | 10,767,033 | ​ | $ | 2,816,910 | ​ | $ | — | ​ | $ | 13,583,943
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ | ​ | ​ | ​ | ​ | Gross Unrealized | ​ | Aggregate
​ |  | Cost |  | Gains |  | Losses |  | Fair Value
Equity securities | ​ | $ | 2,098,144 | ​ | $ | 1,892,389 | ​ | $ | — | ​ | $ | 3,990,533
Mutual funds and exchange traded funds | ​ | ​ | 3,909,364 | ​ | ​ | 104,592 | ​ | ​ | — | ​ | ​ | 4,013,956
Certificates of deposit | ​ |  | 75,000 | ​ |  | 2,344 | ​ |  | — | ​ |  | 77,344
​ | ​ | $ | 6,082,508 | ​ | $ | 1,999,325 | ​ | $ | — | ​ | $ | 8,081,833

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