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Description of Business (Details) - Schedule of entities majority-owned subsidiaries	6 Months Ended
	Jan. 31, 2022
Rafael Holdings, Inc. [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	100.00%
Broad Atlantic Associates, LLC [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	100.00%
IDT 225 Old NB Road, LLC [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	100.00%
IDT R.E. Holdings Ltd. [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	Israel
Percentage Owned	100.00%
Rafael Holdings Realty, Inc. [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	100.00%
Barer Institute, Inc. [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	100.00%
The Barer Institute, LLC [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	100.00%
Hillview Avenue Realty, JV [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	100.00%
Hillview Avenue Realty, LLC [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	100.00%
Rafael Medical Devices, LLC [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	100.00%
Levco Pharmaceuticals Ltd. [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	Israel
Percentage Owned	95.00%
Farber Partners, LLC [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	93.00%
Pharma Holdings, LLC [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	90.00%
LipoMedix Pharmaceuticals Ltd. [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	Israel
Percentage Owned	84.00%
Altira Capital & Consulting, LLC [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	67.00%
CS Pharma Holdings, LLC [Member]
Variable Interest Entity [Line Items]
Country of Incorporation	United States – Delaware
Percentage Owned	45.00%	[1]
[1] 50% of CS Pharma Holdings, LLC is owned by Pharma Holdings, LLC. We have a 90% ownership in Pharma Holdings, LLC and, therefore, an effective 45% interest in CS Pharma Holdings, LLC.

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