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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
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)