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Earnings Per Share (Details Textual) (Warrant [Member], USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Warrant [Member]
   
Earnings Per Share (Textual)    
Antidilutive securities excluded from computation of diluted earnings per share 840,454 840,454
Warrant exercise price $ 3.20 $ 3.20
Average trading price $ 1.63 $ 1.88