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Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2013
Summary of Quarterly Financial Information | The following summarized (unaudited) quarterly financial information presents the results of operations and other data for three-month periods ended March 31, June 30, September 30 and December 31, 2013 and 2012.
|  | First Quarter 2013 |  | Second Quarter 2013 |  | Third Quarter 2013 |  | Fourth Quarter 2013 |
Total Income (Loss) |  | $ | 3,488,007 |  | $ | (2,281,454) |  | $ | 5,892,884 |  | $ | (678,456) |
Total Expenses |  |  | 247,095 |  |  | 220,417 |  |  | 205,028 |  |  | 170,197 |
Net Income (Loss) |  | $ | 3,240,912 |  | $ | (2,501,871) |  | $ | 5,687,856 |  | $ | (848,653) |
Net Income (Loss) per Share |  | $ | 1.22 |  | $ | (0.96) |  | $ | 3.12 |  | $ | (0.36) |
|  | First Quarter 2012 |  | Second Quarter 2012 |  | Third Quarter 2012 |  | Fourth Quarter 2012 |
Total Income (Loss) |  | $ | 9,471,904 |  | $ | (25,764,862) |  | $ | 8,792,836 |  | $ | (1,848,278) |
Total Expenses |  |  | 315,716 |  |  | 265,297 |  |  | 248,705 |  |  | 220,660 |
Net Income (Loss) |  | $ | 9,156,188 |  | $ | (26,030,159) |  | $ | 8,544,131 |  | $ | (2,068,938) |
Net Income (Loss) per Share |  | $ | 2.35 |  | $ | (7.91) |  | $ | 2.50 |  | $ | (0.59) |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=25249566&loc=d3e1280-108306 + Details
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