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QUARTERLY FINANCIAL DATA (Unaudited) (Summarized Quarterly Financial Information (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
QUARTERLY FINANCIAL DATA (Unaudited)
Total Income (Loss)	$ 7,084,009	$ (4,048,873)	$ (1,607,177)	$ 13,503,903	$ (26,637,430)	$ 5,406,682	$ 9,735,886	$ 6,636,435	$ 14,931,862	$ (4,858,427)	$ 2,651,670
Total Expenses	116,369	114,129	132,975	134,064	141,243	163,681	172,297	172,379	497,537	649,600	929,715
Net income (loss)	$ 6,967,640	$ (4,163,002)	$ (1,740,152)	$ 13,369,839	$ (26,778,673)	$ 5,243,001	$ 9,563,589	$ 6,464,056	$ 14,434,325	$ (5,508,027)	$ 1,721,955
Net Income (Loss) per Share	$ 2.79	$ (1.64)	$ (0.72)	$ 4.70	$ (9.32)	$ 1.77	$ 2.72	$ 1.60	$ 5.13	$ (3.23)	$ 0.66

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