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Shareholders' Equity (Details 3) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Plan Shares Available for Grant    
Balance at the beginning of the period (in shares) 99,685 21
Reserved (in shares) 250,000 500,000
Stock awards granted (39,032)  
Balance at the end of the period (in shares) 95,968 99,685
Stock Options
    
Plan Shares Available for Grant    
Available for grant (in shares) (115,000) (737,500)
Plan Options Outstanding    
Balance at the beginning of the period (in shares) 1,469,673 1,234,737
Granted (in shares) 115,000 737,500
Exercised (in shares) (38,165)  
Balance at the end of the period (in shares) 1,251,442 1,469,673
Weighted Average Exercise Price Per Share    
Balance at the beginning of the period (in dollars per share) $ 3.03 $ 4.87
Granted (in dollars per share) $ 2.49 $ 1.67
Exercised (in dollars per share) $ 1.84  
Balance at the beginning of the period (in dollars per share) $ 2.72 $ 3.03
Aggregate Intrinsic Value, Exercised (in dollars) $ 20,810  
2003 Plan | Stock Options
    
Plan Shares Available for Grant    
Available for grant cancelled (in shares) (99,685) 337,164
Plan Options Outstanding    
Cancelled (in shares) (263,666) (337,164)
Weighted Average Exercise Price Per Share    
Cancelled (in dollars per share) $ 3.64 $ 3.77
1990 Plan | Stock Options
    
Plan Options Outstanding    
Cancelled (in shares) (31,400) (165,400)
Weighted Average Exercise Price Per Share    
Cancelled (in dollars per share) $ 10.37 $ 9.19