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QUARTERLY FINANCIAL DATA (Quarterly Financial Information Presents The Results Of Operations) (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Total Income (Loss) $ (3,465,367) $ 3,406,724 $ 2,309,257 $ (6,713,578) $ (6,690,685) $ (5,015,695) $ (1,924,977) $ (418,515) $ (4,462,964) $ (14,049,872) $ (13,388,713)
Total Expenses 143,630 122,485 94,598 74,018 51,418 119,657 124,760 112,956 434,731 408,791 482,966
Expense waiver (26,148) (13,434) (12,614) (16,307) 0 (39,596) (35,903) (37,670) (68,503) (113,169) (151,688)
Net Expenses 117,482 109,051 81,984 57,711 51,418 80,061 88,857 75,286 366,228 295,622 331,278
Net Loss $ (3,582,849) $ 3,297,673 $ 2,227,273 $ (6,771,289) $ (6,742,103) $ (5,095,756) $ (2,013,834) $ (493,801) $ (4,829,192) $ (14,345,494) $ (13,719,991)
Net Income (Loss) per Unit (1.45) 1.3 1.01 (4.84) (6.73) (4.63) (1.70) (0.75) (3.98) (13.81) (18.75)