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Summary of Significant Accounting Policies (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Summary of Significant Accounting Policies [Abstract]        
Number of shares excluded from the computation of net loss per share     17,018,180 12,157,634
Foreign currency translation adjustment $ (2,764) $ 509 $ (4,307) $ 509