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SELECTED QUARTERLY FINANCIAL DATA (Unaudited) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | 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, 2013 | Dec. 31, 2012 | Dec. 31, 2011
SELECTED QUARTERLY FINANCIAL DATA (Unaudited) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ 9,271 | $ 8,582 | $ 7,915 | $ 7,879 | $ 8,038 | $ 7,639 | $ 8,522 | $ 8,335 | $ 8,846 | $ 8,408 | $ 7,025 | $ 6,679 |  |  |
Operating income (loss) | 692 | 359 | 118 | (6,160) | (5,880) | (2,709) | (991) | (712) | (736) | (689) | (723) | (3,068) | (4,991) | (10,344) | (5,216)
Income (loss) before income tax and discontinued operations | (1,217) | (706) | 367 | (6,130) | (6,079) | (3,155) | 624 | (833) | (2,443) | 1,022 | 420 | (4,932) | (7,686) | (9,495) | (5,933)
Benefit from (provision for) income taxes | 0 | 0 | 0 | 0 | (1,302) | 1,285 | (379) | 388 | 2,671 | (892) | (618) | 2,594 | 0 | (44) | (3,755)
Discontinued operations, net of taxes | (3) | (128) | 206 | 232 | (548) | (75) | (1,235) | 64 | (3,019) | 138 | 123 | 129 | 307 | (1,794) | (2,629)
Net income (loss) | $ (1,220) | $ (834) | $ 573 | $ (5,898) | $ (7,929) | $ (1,945) | $ (990) | $ (381) | $ (2,791) | $ 268 | $ (75) | $ (2,209) | $ (7,379) | $ (11,245) | $ (4,807)
Income (loss) per share, basic [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ (0.04) | $ (0.03) | $ 0.01 | $ (0.22) | $ (0.27) | $ (0.07) | $ 0.01 | $ (0.01) | $ 0.01 | $ 0 | $ (0.01) | $ (0.08) |  |  |
Discontinued operations (in dollars per share) | $ 0 | $ 0 | $ 0.01 | $ 0.01 | $ (0.02) | $ 0 | $ (0.05) | $ 0 | $ (0.12) | $ 0.01 | $ 0.01 | $ 0 |  |  |
Income (loss) per share, basic (in dollars per share) | $ (0.04) | $ (0.03) | $ 0.02 | $ (0.21) | $ (0.29) | $ (0.07) | $ (0.04) | $ (0.01) | $ (0.11) | $ 0.01 | $ 0 | $ (0.08) |  |  |
Basic weighted average shares outstanding (in shares) | 27,682,602 | 27,682,602 | 27,682,272 | 27,667,102 | 27,475,813 | 27,468,355 | 27,460,483 | 27,438,584 | 27,288,470 | 27,259,174 | 27,220,049 | 27,186,438 |  |  |
Income (loss) per shares, diluted [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ (0.04) | $ (0.03) | $ 0.01 | $ (0.22) | $ (0.27) | $ (0.07) | $ 0.01 | $ (0.01) | $ 0.01 | $ 0 | $ (0.01) | $ (0.08) |  |  |
Discontinued operations (in dollars per share) | $ 0 | $ 0 | $ 0.01 | $ 0.01 | $ (0.02) | $ 0 | $ (0.05) | $ 0 | $ (0.12) | $ 0.01 | $ 0.01 | $ 0 |  |  |
Income (loss) per share, diluted (in dollars per share) | $ (0.04) | $ (0.03) | $ 0.02 | $ (0.21) | $ (0.29) | $ (0.07) | $ (0.04) | $ (0.01) | $ (0.11) | $ 0.01 | $ 0 | $ (0.08) |  |  |
Diluted weighted average shares outstanding (in shares) | 27,682,602 | 27,682,602 | 27,682,272 | 27,667,102 | 27,475,813 | 27,468,355 | 27,460,483 | 27,438,584 | 27,288,470 | 27,862,098 | 27,866,544 | 27,186,438 |  |  |

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