Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2018
Nov. 08, 2018
Registrant Name Mentor Capital, Inc.  
Registrant CIK 0001599117  
SEC Form 10-Q  
Period End date Sep. 30, 2018  
Fiscal Year End --12-31  
Trading Symbol mntr  
Tax Identification Number (TIN) 770395098  
Number of common stock shares outstanding   23,139,837
Filer Category Non-accelerated Filer  
Current with reporting Yes  
Small Business true  
Emerging Growth Company false  
Amendment Flag false  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Entity Incorporation, State Country Name Delaware  
Entity Address, Address Line One 511 Fourteenth Street, Suite A-2, A-4, A-6  
Entity Address, City or Town Ramona  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 92065  
City Area Code 760  
Local Phone Number 788-4700