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QUARTERLY FINANCIAL DATA - (UNAUDITED) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
QUARTERLY FINANCIAL DATA - (UNAUDITED)
Revenues	$ 18,728,000	$ 21,115,000	$ 31,487,000	$ 63,204,000	$ 57,053,000	$ 41,835,000	$ 30,384,000	$ 67,045,000	$ 134,534,540	$ 196,317,215	$ 151,028,582
Income (loss) from operations	(6,836,000)	(5,827,000)	(5,620,000)	10,905,000	7,069,000	2,096,000	(2,860,000)	20,475,000	(7,378,074)	26,779,411	18,164,890
Net income (loss)	$ (4,712,000)	$ (3,952,000)	$ (4,004,000)	$ 6,351,000	$ 4,150,000	$ 1,112,000	$ (1,974,000)	$ 12,384,000	$ (6,316,041)	$ 15,671,879	$ 10,833,215
Net income (loss) per share basic	$ (0.21)	$ (0.18)	$ (0.18)	$ 0.29	$ 0.19	$ 0.05	$ (0.09)	$ 0.58	$ (0.29)	$ 0.73	$ 0.51
Net income (loss) per share diluted	$ (0.21)	$ (0.18)	$ (0.18)	$ 0.29	$ 0.19	$ 0.05	$ (0.09)	$ 0.57	$ (0.29)	$ 0.72	$ 0.50

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