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Stock-Based Compensation; Changes in Equity (Details 2) (USD $)
 3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Shares, Options Outstanding (in shares) 218,500 218,500
Weighted Average, Options Outstanding (in dollars per share) $ 5.21 $ 5.21
Remaining Life, Options Outstanding 3 years 8 months 12 days  
Intrinsic Value, Options Outstanding $ 182,405  
Shares, Options Vested (in shares) 49,668  
Weighted Average, Options Vested (in dollars per share) $ 4.13  
Remaining Life, Option Vested 2 years 9 months 18 days  
Intrinsic Value, Options Vested (in dollars) 92,175  
Stock Options By Grant Date Dec 2005 [Member]
    
Shares, Options Outstanding (in shares) 29,500  
Weighted Average, Options Outstanding (in dollars per share) $ 2.88  
Remaining Life, Options Outstanding 2 years 9 months 18 days  
Intrinsic Value, Options Outstanding 91,745  
Shares, Options Vested (in shares) 29,500  
Weighted Average, Options Vested (in dollars per share) $ 2.88  
Remaining Life, Option Vested 2 years 9 months 18 days  
Intrinsic Value, Options Vested (in dollars) 91,745  
Stock Options By Grant Date Dec 2010 [Member]
    
Shares, Options Outstanding (in shares) 72,000  
Weighted Average, Options Outstanding (in dollars per share) $ 6.14  
Remaining Life, Options Outstanding 2 years 9 months 18 days  
Intrinsic Value, Options Outstanding 1,040  
Shares, Options Vested (in shares) 17,500  
Weighted Average, Options Vested (in dollars per share) $ 5.97  
Remaining Life, Option Vested 2 years 9 months 18 days  
Intrinsic Value, Options Vested (in dollars) 350  
Stock Options By Grant Date Jan 2011 [Member]
    
Shares, Options Outstanding (in shares) 8,000  
Weighted Average, Options Outstanding (in dollars per share) $ 5.96  
Remaining Life, Options Outstanding 2 years 9 months 18 days  
Intrinsic Value, Options Outstanding 240  
Shares, Options Vested (in shares) 2,668  
Weighted Average, Options Vested (in dollars per share) $ 5.96  
Remaining Life, Option Vested 2 years 9 months 18 days  
Intrinsic Value, Options Vested (in dollars) 80  
Stock Options By Grant Date Nov 2012 [Member]
    
Shares, Options Outstanding (in shares) 109,000  
Weighted Average, Options Outstanding (in dollars per share) $ 5.17  
Remaining Life, Options Outstanding 4 years 8 months 12 days  
Intrinsic Value, Options Outstanding 89,380  
Shares, Options Vested (in shares) 0  
Weighted Average, Options Vested (in dollars per share) $ 0  
Remaining Life, Option Vested 0 years  
Intrinsic Value, Options Vested (in dollars) $ 0