Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Segment Reporting Information [Line Items]
Revenues	$ 365,410	$ 370,035	$ 1,154,848	$ 1,106,742
Income (loss) from operations	(1,693)	(6,502)	(2,090)	1,812
Severance	3,658		4,293
Other operating expenses	(345)	(10,163)	(1,970)	(11,251)
Operating Segments [Member] | Telecom & Payment Services [Member]
Segment Reporting Information [Line Items]
Revenues	356,362	362,060	1,128,510	1,083,495
Income (loss) from operations	3,101	6,022	11,974	19,755
Severance	3,592		4,197
Other operating expenses		(63)		(63)
Operating Segments [Member] | net2phone-UCaaS [Member]
Segment Reporting Information [Line Items]
Revenues	9,086	7,408	25,172	21,686
Income (loss) from operations	(769)	(456)	(2,233)	(1,094)
Severance
Other operating expenses
Operating Segments [Member] | All Other [Member]
Segment Reporting Information [Line Items]
Revenues	(38)	567	1,166	1,561
Income (loss) from operations	(1,138)	(120)	(2,600)	26
Severance
Other operating expenses
Operating Segments [Member] | Corporate [Member]
Segment Reporting Information [Line Items]
Revenues
Income (loss) from operations	(2,887)	(11,948)	(9,231)	(16,875)
Severance	66		96
Other operating expenses	$ (345)	$ (10,100)	$ (1,970)	$ (11,188)