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Name:	us-gaap_RelatedPartyTransactionAxis=rfl_CornerstonePharmaceuticalsMember
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- Details

Name:	us-gaap_RelatedPartyTransactionAxis=rfl_LipomedixPharmaceuticalsLtdMember
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Related Party Transactions (Details)						12 Months Ended
Related Party Transactions (Details)	Jul. 31, 2023 USD ($) ft² shares	Feb. 09, 2023 USD ($) $ / shares shares	Jul. 06, 2022 USD ($) $ / shares shares	Nov. 15, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Jul. 31, 2023 USD ($) ft² shares	Jul. 31, 2022 USD ($) shares	May 22, 2023	Mar. 21, 2023 USD ($)	Jun. 06, 2022 $ / shares
Related Party Transactions (Details) [Line Items]
Related party expenses						$ 313,000	$ 343,000
Due to related parties						$ 70,000	69,000
Area of land (in Square Feet) \| ft²	80,000					80,000
Discontinued operations						$ 102,000
Approximately discontinued operations	$ 19,000					19,000	2,000,000
Allowance for uncollectible	$ 720,000					720,000	720,000
Related party receivable							$ 720,000
Accrued interest									$ 2,000,000
Maturity date								Nov. 30, 2023
Payroll costs						$ 10,000
Revenue percentage						42.00%	58.00%
Recognized loss						$ 0	$ 575,000
Consideration amount					$ 5,000,000
Warrants percentage					20.00%
Exercise price (in Dollars per share) \| $ / shares										$ 22.91
Shares issued (in Shares) \| shares			3,225,806
Price per share (in Dollars per share) \| $ / shares			$ 1.86
Aggregate sale price			$ 6,000,000
Aggregate voting percentage	51.30%
Ordinary shares, purchased (in Shares) \| shares		70,000,000
Ordinary shares, price per share (in Dollars per share) \| $ / shares		$ 0.03
Aggregate purchase price		$ 2,100,000
Ownership percentage		95.00%
Carrying amount of the noncontrolling interest		$ 16,000
Investment amount						1,600,000
Profit on investment in equity securities						$ 309,000
LipoMedix [Member]
Related Party Transactions (Details) [Line Items]
Ownership percentage				84.00%
Noncontrolling interest percentage		5.00%		16.00%
Israel [Member]
Related Party Transactions (Details) [Line Items]
Area of land (in Square Feet) \| ft²	3,600					3,600
Class B Common Stock [Member]
Related Party Transactions (Details) [Line Items]
Purchase of shares (in Shares) \| shares					218,245
Common stock, shares issued (in Shares) \| shares	23,635,709					23,635,709	23,712,449
Class A Common Stock [Member]
Related Party Transactions (Details) [Line Items]
Common stock, shares issued (in Shares) \| shares	787,163					787,163	787,163
RP Finance [Member]
Related Party Transactions (Details) [Line Items]
Income from its ownership percentage	37.50%					37.50%	37.50%
Chief Executive Officer [Member] \| Class A Common Stock [Member]
Related Party Transactions (Details) [Line Items]
Common stock, shares issued (in Shares) \| shares	787,163					787,163
IDT Corporation [Member]
Related Party Transactions (Details) [Line Items]
Discontinued operations						$ 211,000
Approximately discontinued operations							$ 2,100,000
IDT Owed [Member]
Related Party Transactions (Details) [Line Items]
Rent and parking expenses						$ 210,000	157,000
Cornerstone Pharmaceuticals [Member]
Related Party Transactions (Details) [Line Items]
Billed amount							$ 120,000
LipoMedix Pharmaceuticals, Ltd. [Member]
Related Party Transactions (Details) [Line Items]
Purchase of shares (in Shares) \| shares				15,975,000
Outstanding loan balance				$ 400,000
Accrued interest				21,800
Due from owed amount				3,000,000
Cash payment				$ 2,600,000