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Acquisition (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Unaudited pro forma information        
Revenue $ 34,822 $ 39,862 $ 104,316 $ 113,494
Net income (loss) (52) 1,569 495 509
Net income (loss) applicable to common stockholders $ (175) $ 1,502 $ 233 $ 318