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Financing (Details 2) (USD $)
In Thousands, except Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Debt Conversion [Line Items]  
Debentures, Outstanding principal and accrued interest $ 43,665
Debentures, Principal and accrued interest converted since inception $ 11,747
Common shares issued (in shares) 4,403,415