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Quarterly Financial Data (Unaudited) (Summarized Quarterly Financial Information (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information [Line Items]
Total income (loss)	$ (12,030,910)	$ (19,144,755)	$ 8,888,385	$ (5,092,160)	$ (17,575,229)	$ (6,424,544)	$ 4,045,515	$ 1,636,925	$ (27,379,440)	$ (18,317,333)	$ 6,420,981
Total expenses	134,404	141,411	174,595	125,096	94,542	115,775	132,839	145,584	575,506	488,740	842,737
Net income (loss)	$ (12,165,314)	$ (19,286,166)	$ 8,713,790	$ (5,217,256)	$ (17,669,771)	$ (6,540,319)	$ 3,912,676	$ 1,491,341	$ (27,954,946)	$ (18,806,073)	$ 5,578,244
Net income (loss) per share	$ (3.45)	$ (6.39)	$ 2.88	$ (2.63)	$ (15.21)	$ (5.37)	$ 3.07	$ 1.27	$ (9.59)	$ (16.24)	$ 3.02

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=51831255

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=51831270

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