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Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Segment Reporting Information [Line Items]
Revenues	$ 367,556	$ 382,454	$ 736,707	$ 773,032
Income (loss) from operations	3,128	6,377	8,314	14,303
Other operating expense	(889)	(326)	(1,088)	(326)
Operating Segments [Member] | Telecom Platform Services [Member]
Segment Reporting Information [Line Items]
Revenues	358,528	370,575	718,550	749,217
Income (loss) from operations	6,948	6,878	13,192	16,905
Other operating expense		(326)		(326)
Operating Segments [Member] | UCaaS [Member]
Segment Reporting Information [Line Items]
Revenues	7,142	6,117	14,278	13,163
Income (loss) from operations	(464)	(576)	(639)	(878)
Other operating expense
Operating Segments [Member] | Consumer Phone Services [Member]
Segment Reporting Information [Line Items]
Revenues	1,396	1,766	2,885	3,595
Income (loss) from operations	239	289	540	629
Other operating expense
Operating Segments [Member] | All Other [Member]
Segment Reporting Information [Line Items]
Revenues	490	3,996	994	7,057
Income (loss) from operations	82	1,845	172	2,275
Other operating expense
Operating Segments [Member] | Corporate [Member]
Segment Reporting Information [Line Items]
Revenues
Income (loss) from operations	(3,677)	(2,059)	(4,951)	(4,628)
Other operating expense	$ (889)		$ (1,088)

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.6)
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 225
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