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Quarterly Data And Share Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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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
Quarterly Data And Share Information [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 4,567 | $ 5,806 | $ 5,222 | $ 4,962 | $ 4,274 | $ 4,350 | $ 4,782 | $ 3,656 | $ 20,557 | $ 17,062 | $ 13,211
Net income from continuing operations | 859 | 1,279 | 1,152 | 954 | 2,256 | 1,237 | 1,037 | 436 | 4,244 | 4,966 | 1,911
Net (loss) from discontinued operations | $ (4,105) | $ (60) | $ (65) | $ (81) | $ (93) | $ (51) | $ (60) | $ (82) | $ (4,311) | $ (286) | $ (3,656)
Income per common share from continuing operations | $ 0.01 | $ 0.02 | $ 0.02 | $ 0.02 | $ 0.04 | $ 0.02 | $ 0.02 | $ 0.01 | $ 0.07 | $ 0.08 | $ 0.03
(Loss) per common share from discontinued operations | $ (0.07) | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | $ (0.07) | $ 0.00 | $ (0.06)

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