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Stock Option Plans (Details 4) (Officer and Employee Plans [Member], USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Officer and Employee Plans [Member]
      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares, Outstanding 670,300 572,600 520,900
Shares, Granted 203,000 202,000 221,000
Shares, Exercised 0 0 0
Shares, Forfeited (62,475) (104,300) (169,300)
Shares, Outstanding 810,825 670,300 572,600
Shares, Options exercisable 307,025 274,680 295,415
Weighted-average fair value of options granted during the year $ 1.17 $ 0.78 $ 0.95
Average Exercisable Price Outstanding (in dollars per share) $ 3.86 $ 4.63 $ 5.79
Average Exercisable Price Granted (in dollars per share) $ 2.37 $ 1.65 $ 1.67
Average Exercisable Price Exercised (in dollars per share) $ 0 $ 0 $ 0
Average Exercisable Price Forfeited (in dollars per share) $ 3.40 $ 3.89 $ 4.31
Average Exercisable Price Outstanding (in dollars per share) $ 3.51 $ 3.86 $ 4.63
Average Exercisable Price, Options exercisable (in dollars per share) $ 6.10 $ 6.82 $ 6.67
Aggregate Intrinsic Value Outstanding $ 257,570    
Aggregate Intrinsic Value Options exercisable at year end $ 39,039