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Shareholders' Equity (Details 4) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Information by exercise price range    
Options Outstanding, Number Outstanding (in shares) 1,251,442  
Options Outstanding, Weighted Average Remaining Contractual Life 7 years 10 months 2 days  
Options Outstanding, Weighted Average Exercise Price Per Share $ 2.72  
Options Exercisable, Number Exercisable (in shares) 686,998 572,552
Options Exercisable, Weighted Average Exercise Price Per Share $ 3.22  
Stock option disclosures    
Weighted average remaining life of options outstanding 7 years 10 months 2 days  
Aggregate intrinsic value of options outstanding (in dollars) $ 722,000  
Weighted average remaining life of options exercisable 7 years 1 month 20 days  
Aggregate intrinsic value of options exercisable (in dollars) 275,000  
Weighted average grant-date fair value of options granted (in dollars per share) $ 1.01 $ 0.90
Total number of shares granted to the Board of directors (in shares) 39,032  
Shares issue price (in dollars per share) $ 2.69  
Total value of shares issued $ 105,000  
$1.61 - $2.46
    
Information by exercise price range    
Ranges of Exercise Prices, Lower (in dollars per share) $ 1.61  
Ranges of Exercise Prices, Upper (in dollars per share) $ 2.46  
Options Outstanding, Number Outstanding (in shares) 784,701  
Options Outstanding, Weighted Average Remaining Contractual Life 8 years 7 months 6 days  
Options Outstanding, Weighted Average Exercise Price Per Share $ 1.81  
Options Exercisable, Number Exercisable (in shares) 288,839  
Options Exercisable, Weighted Average Exercise Price Per Share $ 1.78  
$2.79 - $4.22
    
Information by exercise price range    
Ranges of Exercise Prices, Lower (in dollars per share) $ 2.79  
Ranges of Exercise Prices, Upper (in dollars per share) $ 4.22  
Options Outstanding, Number Outstanding (in shares) 324,741  
Options Outstanding, Weighted Average Remaining Contractual Life 6 years 9 months 11 days  
Options Outstanding, Weighted Average Exercise Price Per Share $ 3.67  
Options Exercisable, Number Exercisable (in shares) 256,159  
Options Exercisable, Weighted Average Exercise Price Per Share $ 3.58  
$5.49
    
Information by exercise price range    
Exercise price (in dollars per share) $ 5.49  
Options Outstanding, Number Outstanding (in shares) 142,000  
Options Outstanding, Weighted Average Remaining Contractual Life 6 years 29 days  
Options Outstanding, Weighted Average Exercise Price Per Share $ 5.49  
Options Exercisable, Number Exercisable (in shares) 142,000  
Options Exercisable, Weighted Average Exercise Price Per Share $ 5.49