Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 340,245	$ 362,316
Income (loss) from operations	(1,392)	182
Other operating expense, net	(2,775)	(1,295)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	340,245	362,316
Income (loss) from operations	(1,392)	182
Other operating expense, net	(2,775)	(1,295)
Operating Segments [Member] | Telecom & Payment Services [Member]
Segment Reporting Information [Line Items]
Revenues	327,618	351,849
Income (loss) from operations	4,372	4,169
Other operating expense, net	(2,150)	(1,100)
Operating Segments [Member] | net2phone [Member]
Segment Reporting Information [Line Items]
Revenues	12,627	10,467
Income (loss) from operations	(3,263)	(1,500)
Other operating expense, net	(365)
Operating Segments [Member] | Corporate [Member]
Segment Reporting Information [Line Items]
Revenues
Income (loss) from operations	(2,501)	(2,487)
Other operating expense, net	$ (260)	$ (195)