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QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 USD ($) $ / shares $ / item | Sep. 30, 2015 USD ($) $ / shares $ / item | Jun. 30, 2015 USD ($) $ / shares $ / item | Mar. 31, 2015 USD ($) $ / shares $ / item | Dec. 31, 2014 USD ($) $ / shares $ / item | Sep. 30, 2014 USD ($) $ / shares $ / item | Jun. 30, 2014 USD ($) $ / shares $ / item | Mar. 31, 2014 USD ($) $ / shares $ / item | Dec. 31, 2015 USD ($) $ / shares $ / item | Dec. 31, 2014 USD ($) $ / shares $ / item | Dec. 31, 2013 USD ($) $ / shares
QUARTERLY FINANCIAL DATA (UNAUDITED) |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 12,133,802 | $ 11,209,974 | $ 11,061,418 | $ 11,075,520 | $ 10,810,827 | $ 10,643,029 | $ 10,560,535 | $ 10,617,928 | $ 45,480,714 | $ 42,632,319 | $ 38,364,552
Expenses | 8,653,490 | 7,874,926 | 7,810,234 | 8,430,376 | 7,924,264 | 7,916,421 | 7,835,735 | 8,053,306 | 32,769,026 | 31,729,726 | 27,233,135
Income Before Other Income (Expense) and Discontinued Operations | 3,480,312 | 3,335,048 | 3,251,184 | 2,645,144 | 2,886,563 | 2,726,608 | 2,724,800 | 2,564,622 | 12,711,688 | 10,902,593 | 11,131,417
Income (Loss) From Discontinued Operations |  |  |  |  |  |  |  |  |  |  | 3,697,886
Other Income (Loss) | (2,287,608) | (2,261,302) | (2,154,727) | (2,235,486) | (2,295,307) | (2,545,121) | (2,443,079) | (2,594,236) | (8,939,123) | (9,877,743) | (9,173,918)
Net Income | $ 1,192,704 | $ 1,073,746 | $ 1,096,457 | $ 409,658 | $ 591,256 | $ 181,487 | $ 281,721 | $ (29,614) | $ 3,772,565 | $ 1,024,850 | $ 5,655,385
Net Income (Loss) per Unit before Discontinued Operations (in dollars per unit) | $ / shares | $ 9.47 | $ 8.51 | $ 8.66 | $ 3.22 | $ 4.60 | $ 1.41 | $ 2.18 | $ (0.23) | $ 29.86 | $ 7.96 | $ 15.07
Net Income per Unit (in dollars per unit) | $ / shares | $ 9.47 | $ 8.51 | $ 8.66 | $ 3.22 | $ 4.60 | $ 1.41 | $ 2.18 | $ (0.23) | $ 29.86 | $ 7.96 | $ 43.55
Income Per Depositary Receipt Before Discontinued Operations (in dollars per unit) | $ / item | 0.32 | 0.28 | 0.29 | 0.11 | 0.15 | 0.05 | 0.07 | (0.01) | 1.00 | 0.27 |
Net Income (Loss) per Depositary Receipt after Discontinued Operations (in dollars per receipt) | $ / item | 0.32 | 0.28 | 0.29 | 0.11 | 0.15 | 0.05 | 0.07 | (0.01) | 1.00 | 0.27 |

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