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Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region - USD ($) $ in Thousands | 12 Months Ended
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Jul. 31, 2020 | Jul. 31, 2019
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | $ 1,345,769 | $ 1,409,172
Telecom & Payment Services [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 1,294,947 | 1,361,908
net2phone [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 50,822 | 47,264
United States [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 922,864 | 935,854
United States [Member] | Telecom & Payment Services [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 888,728 | 901,997
United States [Member] | net2phone [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 34,136 | 33,857
United Kingdom [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 134,351 | 195,682
United Kingdom [Member] | Telecom & Payment Services [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 134,339 | 195,661
United Kingdom [Member] | net2phone [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 12 | 21
Netherlands [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 210,743 | 192,284
Netherlands [Member] | Telecom & Payment Services [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 210,743 | 192,284
Netherlands [Member] | net2phone [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL |  |
Other [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 77,811 | 85,352
Other [Member] | Telecom & Payment Services [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 61,137 | 71,966
Other [Member] | net2phone [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 16,674 | 13,386
Outside the United States [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 422,905 | 473,318
Outside the United States [Member] | Telecom & Payment Services [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | 406,219 | 459,911
Outside the United States [Member] | net2phone [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
TOTAL | $ 16,686 | $ 13,407

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(b)(2)) -URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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