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Derivative Instruments (Details) - Schedule of derivative instruments on consolidated statements of comprehensive income (loss) - USD ($) $ in Thousands | 12 Months Ended
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Jul. 31, 2021 | Jul. 31, 2020
Schedule of derivative instruments on consolidated statements of comprehensive income (loss) [Abstract] |  |
Location of Loss Recognized on Derivatives | Net loss resulting from foreign exchange transactions |
Foreign exchange forward contracts | $ (18) | $ (218)

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- Definition Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
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Period Type: | duration

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- References No definition available. + Details
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