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Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Segment Reporting Information [Line Items]
Revenues	$ 393,555	$ 369,151
Income (loss) from operations	83	5,186
Severance	439
Other operating expense	(779)	(199)
Operating Segments [Member] | Telecom Platform Services [Member]
Segment Reporting Information [Line Items]
Revenues	385,063	361,511
Income (loss) from operations	4,561	6,544
Severance	409
Other operating expense
Operating Segments [Member] | net2phone-UCaaS [Member]
Segment Reporting Information [Line Items]
Revenues	7,788	7,136
Income (loss) from operations	(674)	(174)
Severance
Other operating expense
Operating Segments [Member] | All Other [Member]
Segment Reporting Information [Line Items]
Revenues	704	504
Income (loss) from operations	(631)	90
Severance
Other operating expense
Operating Segments [Member] | Corporate [Member]
Segment Reporting Information [Line Items]
Revenues
Income (loss) from operations	(3,173)	(1,274)
Severance	30
Other operating expense	$ (779)	$ (199)

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-Publisher FASB
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