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QUARTERLY FINANCIAL DATA (Unaudited) (Summarized Quarterly Financial Information (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
QUARTERLY FINANCIAL DATA (Unaudited)                      
Total Income (Loss) $ 26,413,861 $ 10,116,673 $ 98,787,716 $ (25,014,567) $ 7,084,009 $ (4,048,873) $ (1,607,177) $ 13,503,903 $ 110,303,683 $ 14,931,862 $ (4,858,427)
Total Expenses 413,752 554,171 511,025 105,391 116,369 114,129 132,975 134,064 1,584,339 497,537 649,600
Net Income (Loss) $ 26,000,109 $ 9,562,502 $ 98,276,691 $ (25,119,958) $ 6,967,640 $ (4,163,002) $ (1,740,152) $ 13,369,839 $ 108,719,344 $ 14,434,325 $ (5,508,027)
Net Income (Loss) per Share $ 2.12 $ 0.41 $ 2.54 $ (10.79) $ 2.79 $ (1.64) $ (0.72) $ 4.70 $ (5.72) $ 5.13 $ (3.23)