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Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region - USD ($) $ in Thousands | 3 Months Ended
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Oct. 31, 2020 | Oct. 31, 2019
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Revenues, Total | $ 343,425 | $ 340,200
Total outside the United States | 47,625 | 113,058
Fintech [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Revenues, Total | 20,087 | 9,557
Total outside the United States |  |
net2phone [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Revenues, Total | 9,628 | 7,207
Total outside the United States | 4,546 | 3,935
Traditional Communications [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Revenues, Total | 313,710 | 323,436
Total outside the United States | 43,079 | 109,123
United States [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Revenues, Total | 295,800 | 227,142
United States [Member] | Fintech [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Revenues, Total | 20,087 | 9,557
United States [Member] | net2phone [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Revenues, Total | 5,082 | 3,272
United States [Member] | Traditional Communications [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Revenues, Total | 270,631 | 214,313
United Kingdom [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Total outside the United States | 29,421 | 35,797
United Kingdom [Member] | Fintech [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Total outside the United States |  |
United Kingdom [Member] | net2phone [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Total outside the United States |  | 4
United Kingdom [Member] | Traditional Communications [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Total outside the United States | 29,421 | 35,793
Netherlands [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Total outside the United States | 2 | 54,942
Netherlands [Member] | Fintech [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Total outside the United States |  |
Netherlands [Member] | net2phone [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Total outside the United States |  |
Netherlands [Member] | Traditional Communications [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Total outside the United States | 2 | 54,942
Other [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Total outside the United States | 18,202 | 22,319
Other [Member] | Fintech [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Total outside the United States |  |
Other [Member] | net2phone [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Total outside the United States | 4,546 | 3,931
Other [Member] | Traditional Communications [Member] |  |
Revenue Recognition (Details) - Schedule of revenues disaggregated by geographic region [Line Items] |  |
Total outside the United States | $ 13,656 | $ 18,388

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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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