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Net Income /(Loss) Per Share - Computation of Diluted Earnings Per Share (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Anti-dilutive common stock options, Number of Shares 351,000 449,000
Maximum [Member]
   
Anti-dilutive common stock options, Range of Exercise Price Per Share $ 1.31 $ 7.50
Minimum [Member]
   
Anti-dilutive common stock options, Range of Exercise Price Per Share $ 7.50 $ 1.31