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Sale of Interest in Fabrix Systems Ltd. (Tables)
12 Months Ended
Jul. 31, 2015
Sale of Interest in Fabrix Systems Ltd. [Abstract]  
Schedule of consolidated statements of income

Year ended July 31
(in thousands)
 2015  2014  2013 
INCOME (LOSS) BEFORE INCOME TAXES $917  $(57) $(945)
             
INCOME (LOSS) BEFORE INCOME TAXES ATTRIBUTABLE TO IDT CORPORATION $1,325  $3  $(811)