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Basis of Presentation (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, 2013
Dec. 31, 2012
Dec. 31, 2011
Summary of computation of basic and diluted net income (loss) per share                      
Net income (loss) from continuing operations $ 1,869 $ 1,965 $ 3,694 $ 1,304 $ 2,586 $ (194) $ (4,328) $ (738) $ 8,832 $ (2,674) $ 9,712
Discontinued operations                 2,588 2,147 3
Net income (loss) $ 1,869 $ 1,965 $ 6,091 $ 1,495 $ 1,063 $ (194) $ (2,529) $ 1,133 $ 11,420 $ (527) $ 9,715
Shares used to compute basic income (loss) per share                 20,312,395 19,853,095 19,655,632
Dilutive potential common shares:                      
Restricted stock                 352,959      
Stock options                 80,100    57,688
Shares used to compute diluted income (loss) per share 21,056,156,000 20,843,742,000 20,427,360,000 20,280,030,000 20,124,331,000 19,917,676,000 19,749,266,000 19,738,801,000 20,745,454 19,853,095 19,713,320
Basic per share amounts:                      
(Loss) income from continuing operations (in usd per share) $ 0.09 $ 0.10 $ 0.18 $ 0.06         $ 0.43 $ (0.14) $ 0.49
Income from discontinued operations (in usd per share) $ 0.00 $ 0.00 $ 0.12 $ 0.01         $ 0.13 $ 0.11 $ 0.00
Net income (loss) (in usd per share) $ 0.09 $ 0.10 $ 0.30 $ 0.07         $ 0.56 $ (0.03) $ 0.49
Diluted per share amounts:                      
(Loss) income from continuing operations (in usd per share) $ 0.09 $ 0.09 $ 0.18 $ 0.06         $ 0.43 $ (0.14) $ 0.49
Income from discontinued operations (in usd per share) $ 0.00 $ 0.00 $ 0.12 $ 0.01         $ 0.12 $ 0.11 $ 0.00
Net income (loss) income (in usd per share) $ 0.09 $ 0.09 $ 0.30 $ 0.07         $ 0.55 $ (0.03) $ 0.49