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Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
customer
Dec. 31, 2011
Fixed annual interest rate 1.81%  
Provision for doubtful accounts $ 20 $ 20
Number of major customers 2  
Percentage of revenue contributed by major customers 40.00%  
Minimum [Member]
    
Fixed annual interest rate   1.70%
Maximum [Member]
    
Fixed annual interest rate   1.90%