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Leases (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Sep. 01, 2020 | Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2021 | Jan. 31, 2020
Leases (Details) [Line Items] |  |  |  |  |
Operating lease liability | $ 0.6 |  |  |  |
Newark NJ [Member] |  |  |  |  |
Leases (Details) [Line Items] |  |  |  |  |
Lease term, description |  |  |  | The Newark lease expires in April 2025 and the Israel lease expires in July 2025. |
Rafael Holdings, Inc. [Member] |  |  |  |  |
Leases (Details) [Line Items] |  |  |  |  |
Lease cost |  | $ 0.5 | $ 0.5 | $ 0.9 | $ 0.9

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- Definition Description of lease term. + References No definition available. + Details
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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- Details
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- Details
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