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QUARTERLY FINANCIAL DATA (Unaudited) (Summarized Quarterly Financial Information) (Details) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information [Line Items]
Total Income (Loss)	$ 61,200,837	$ 20,645,726	$ 20,511,987	$ 12,500,875	$ (39,352,835)		$ (10,667,801)		$ (43,745,913)		$ (93,242,321)		$ 114,859,425	$ (187,008,870)	$ 104,831,796
Total Expenses	1,166,937	1,074,103	1,177,669	1,403,254	1,959,853		1,365,327		1,473,807		1,636,118		4,821,963	6,435,105	6,099,614
Net Income (Loss)	$ 60,033,900	$ 19,571,623	$ 19,334,318	$ 11,097,621	$ (41,312,688)		$ (12,033,128)		$ (45,219,720)		$ (94,878,439)		$ 110,037,462	$ (193,443,975)	$ 98,732,182
Net Income (Loss) per Share	$ (0.51)	$ 1.15	$ 1.17	$ (0.80)	$ (2.83)	[1]	$ (0.96)	[1]	$ (3.15)	[1]	$ (6.90)	[1]
[1] Adjusted to give effect to the reverse share split of 1-for-4 executed on January 4, 2018.

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