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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)
Jun. 30, 2021
Dec. 31, 2020
U.S. treasury securities $ 7,371,434 $ 10,832,181
Corporate securities 52,073,814 46,451,905
Agency mortgage-backed securities 27,301,413 26,125,608
Equity securities 3,570,416 2,746,706
Short-term investments 6,468,314 200,000
Total financial instruments at fair value 96,785,391 86,356,400
Level 1    
U.S. treasury securities 7,371,434 10,832,181
Corporate securities 0 0
Agency mortgage-backed securities 0 0
Equity securities 3,570,416 2,746,706
Short-term investments 6,468,314 200,000
Total financial instruments at fair value 17,410,164 13,778,887
Level 2    
U.S. treasury securities 0 0
Corporate securities 52,073,814 46,451,905
Agency mortgage-backed securities 27,301,413 26,125,608
Equity securities 0 0
Short-term investments 0 0
Total financial instruments at fair value 79,375,227 72,577,513
Level 3    
U.S. treasury securities 0 0
Corporate securities 0 0
Agency mortgage-backed securities 0 0
Equity securities 0 0
Short-term investments 0 0
Total financial instruments at fair value $ 0 $ 0