Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Revenue from External Customer [Line Items]
Revenues, Total	$ 323,890	$ 349,473	$ 664,089	$ 711,789
Total Telecom & Payment Services [Member]
Revenue from External Customer [Line Items]
Revenues, Total	310,980	337,950	638,552	689,799
Total Telecom & Payment Services [Member] | BOSS Revolution Calling [Member]
Revenue from External Customer [Line Items]
Revenues, Total	112,775	122,146	229,016	245,659
Total Telecom & Payment Services [Member] | Carrier Services [Member]
Revenue from External Customer [Line Items]
Revenues, Total	101,659	127,896	215,176	270,118
Total Telecom & Payment Services [Member] | Mobile Top-Up [Member]
Revenue from External Customer [Line Items]
Revenues, Total	75,818	64,276	152,633	129,623
Total Telecom & Payment Services [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenues, Total	10,951	16,770	22,357	31,527
Total Telecom & Payment Services [Member] | Growth [Member]
Revenue from External Customer [Line Items]
Revenues, Total	9,777	6,862	19,370	12,872
Total net2phone [Member]
Revenue from External Customer [Line Items]
Revenues, Total	12,910	11,523	25,537	21,990
Total net2phone [Member] | net2phone-UCaaS [Member]
Revenue from External Customer [Line Items]
Revenues, Total	7,939	6,027	15,161	10,832
Total net2phone [Member] | Net2phone-Platform Services [Member]
Revenue from External Customer [Line Items]
Revenues, Total	$ 4,971	$ 5,496	$ 10,376	$ 11,158