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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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