Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2018
Jun. 30, 2018
Mar. 15, 2018
Registrant Name Mentor Capital, Inc.    
Registrant CIK 0001599117    
SEC Form 10-K    
Period End date Dec. 31, 2018    
Fiscal Year End --12-31    
Trading Symbol mntr    
Tax Identification Number (TIN) 770395098    
Number of common stock shares outstanding     23,139,837
Public Float   $ 17,009,623  
Filer Category Non-accelerated Filer    
Current with reporting Yes    
Voluntary filer No    
Well-known Seasoned Issuer No    
Shell Company false    
Small Business true    
Emerging Growth Company false    
Amendment Flag false    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
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