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Stock Options (Schedule Of Stock Option Activity) (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Stock Options [Abstract]      
Shares, Outstanding beginning of year 1,471,000 1,571,000 3,021,000
Shares, Granted 87,500 186,745 396,000
Shares, Exercised (105,000) (50,000) (1,831,000)
Shares, Expired/cancelled (81,250) (236,745) (15,000)
Shares, Outstanding end of year 1,372,250 1,471,000 1,571,000
Weighted Average Exercise Price, Outstanding beginning of year $ 0.61 $ 0.60 $ 0.42
Weighted Average Exercise Price, Granted $ 0.85 $ 1.01 $ 0.44
Weighted Average Exercise Price, Exercised $ 0.50 $ 0.57 $ 0.27
Weighted Average Exercise Price, Expired/cancelled $ 1.12 $ 0.82 $ 0.58
Weighted Average Exercise Price, Outstanding end of year $ 0.61 $ 0.61 $ 0.60
Excersiable, end of year, Shares 1,212,250 1,231,000 795,000
Excersiable, end of year, Weighted Average Exercise Price $ 0.62 $ 0.63 $ 0.70