v3.26.3
Cover - USD ($)
 12 Months Ended
Jul. 31, 2026
Oct. 29, 2026
Jan. 31, 2025
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Jul. 31, 2026    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2026    
Current Fiscal Year End Date --07-31    
Entity File Number 001-14468    
Entity Registrant Name PURE Bioscience, Inc.    
Entity Central Index Key 0001006028    
Entity Tax Identification Number 33-0530289    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 771 Jamacha Rd.    
Entity Address, Address Line Two #512    
Entity Address, City or Town El Cajon    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 92019    
City Area Code (619)    
Local Phone Number 596-8600    
Title of 12(g) Security Common Stock, $0.01 par value    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 2,982,000
Entity Common Stock, Shares Outstanding   140,201,055  
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Common Stock, Shares Outstanding $ 0.01    
Auditor Firm ID 572    
Auditor Opinion [Text Block] We have audited the accompanying consolidated balance sheets of Pure Bioscience Inc. (the “Company”) and Subsidiary as of July 31, 2026 and 2025, and the related statements of operations, stockholders’ deficiency, and cash flows for the years then ended, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of July 31, 2026 and 2025, and the results of its operations and its cash flows for the years then ended, in conformity with accounting principles generally accepted in the United States of America.    
Auditor Name Weinberg & Company, P.A.    
Auditor Location Los Angeles, California