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Stock Option Plans (Details 6) (Officer and Employee Plans [Member], USD $)
12 Months Ended
Dec. 31, 2012
Officer and Employee Plans [Member]
 
Number of Shares, Non-vested options 277,185
Number of Shares, Granted 202,000
Number of Shares, Vested (39,665)
Number of Shares, Forfeited (43,900)
Number of Shares, Non-vested options 395,620
Weighted Average Grant Date Fair Value, Non-vested options (in dollars per share) $ 2.47
Weighted Average Grant Date Fair Value, Granted (in dollars per share) $ 1.65
Weighted Average Grant Date Fair Value, Vested (in dollars per share) $ 5.61
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) $ 1.79
Weighted Average Grant Date Fair Value, Non-vested options (in dollars per share) $ 1.80