Severance Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Jul. 31, 2015
Severance Expense (Textual)
Severance expense		$ 1,549
Accrued severance	$ 2,500		$ 3,700
IDT Telecom [Member]
Severance Expense (Textual)
Severance expense	$ 6,200	$ 1,500