v3.26.3
Document and Entity Information
Oct. 13, 2026
Entity Listings [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Oct. 13, 2026
Entity File Number 1-5103
Entity Registrant Name BARNWELL INDUSTRIES INC.
Entity Central Index Key 0000010048
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 72-0496921
Entity Address, Address Line One 24 Greenway Plaza
Entity Address, Address Line Two Suite 1800
Entity Address, City or Town Houston
Entity Address, State or Province TX
Entity Address, Postal Zip Code 77046
City Area Code 713
Local Phone Number 730-7026
Entity Emerging Growth Company false
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Common Stock [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Common Stock, $0.50 Par Value
Trading Symbol BRN
Security Exchange Name NYSEAMER
Common Stock Purchase Rights [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Common Stock Purchase Rights
Trading Symbol N/A
Security Exchange Name NYSEAMER