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Revenue Recognition (Details) - USD ($) $ in Thousands | 3 Months Ended
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Oct. 31, 2018 | Oct. 31, 2017
Revenue from External Customer [Line Items] |  |
Revenues, Total | $ 362,316 | $ 393,555
Telecom & Payment Services [Member] |  |
Revenue from External Customer [Line Items] |  |
Revenues, Total | 351,849 | 385,082
Total net2phone [Member] |  |
Revenue from External Customer [Line Items] |  |
Revenues, Total | 10,467 | 7,788
All Other [Member] |  |
Revenue from External Customer [Line Items] |  |
Revenues, Total |  | 685
Boss Revolution Calling [Member] | Telecom & Payment Services [Member] |  |
Revenue from External Customer [Line Items] |  |
Revenues, Total | 123,513 | 132,184
Carrier Services [Member] | Telecom & Payment Services [Member] |  |
Revenue from External Customer [Line Items] |  |
Revenues, Total | 142,222 | 168,831
Mobile Top-Up [Member] | Telecom & Payment Services [Member] |  |
Revenue from External Customer [Line Items] |  |
Revenues, Total | 65,346 | 61,483
Other [Member] | Telecom & Payment Services [Member] |  |
Revenue from External Customer [Line Items] |  |
Revenues, Total | 14,595 | 18,027
Growth [Member] | Telecom & Payment Services [Member] |  |
Revenue from External Customer [Line Items] |  |
Revenues, Total | 6,173 | 4,557
net2phone-UCaaS [Member] | Total net2phone [Member] |  |
Revenue from External Customer [Line Items] |  |
Revenues, Total | 4,805 | 2,398
net2phone-Platform Services [Member] | Total net2phone [Member] |  |
Revenue from External Customer [Line Items] |  |
Revenues, Total | $ 5,662 | $ 5,390

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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=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=115205541&loc=SL114868664-224227 Reference 3: 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=115929826&loc=d3e8933-108599 Reference 4: 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=115929826&loc=d3e8736-108599 + Details
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