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Consolidated Statement of Stockholders' Equity (Deficiency) (Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income taxes on note conversion $ 300vgr_IncomeTaxesonNoteConversion $ 7,242vgr_IncomeTaxesonNoteConversion $ 14,142vgr_IncomeTaxesonNoteConversion
Income taxes on beneficial conversion feature of notes payable $ 10,327vgr_IncomeTaxesonBeneficialConversionFeatureofNotesPayable   $ 26,066vgr_IncomeTaxesonBeneficialConversionFeatureofNotesPayable