Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Revenue from External Customer [Line Items]
Revenues, Total	$ 340,245	$ 362,316
Total Telecom & Payment Services [Member]
Revenue from External Customer [Line Items]
Revenues, Total	327,618	351,849
Total Telecom & Payment Services [Member] | BOSS Revolution Calling [Member]
Revenue from External Customer [Line Items]
Revenues, Total	116,242	123,513
Total Telecom & Payment Services [Member] | Carrier Services [Member]
Revenue from External Customer [Line Items]
Revenues, Total	113,517	142,222
Total Telecom & Payment Services [Member] | Mobile Top-Up [Member]
Revenue from External Customer [Line Items]
Revenues, Total	76,815	65,346
Total Telecom & Payment Services [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenues, Total	11,244	14,757
Total Telecom & Payment Services [Member] | Growth [Member]
Revenue from External Customer [Line Items]
Revenues, Total	9,800	6,011
Total net2phone [Member]
Revenue from External Customer [Line Items]
Revenues, Total	12,627	10,467
Total net2phone [Member] | net2phone-UCaaS [Member]
Revenue from External Customer [Line Items]
Revenues, Total	7,221	4,805
Total net2phone [Member] | Net2phone-Platform Services [Member]
Revenue from External Customer [Line Items]
Revenues, Total	$ 5,406	$ 5,662