Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2019
Mar. 10, 2020
Jun. 30, 2019
Dec. 31, 2018
Registrant Name Mentor Capital, Inc.      
Registrant CIK 0001599117      
Fiscal Year End --12-31      
Document Type 10-K      
Document Annual Report true      
Document Transition Report false      
Document Period End Date Dec. 31, 2019      
Entity File Number 000-55323      
Entity Incorporation, State or Country Code DE      
Entity Tax Identification Number 77-0395098      
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      
Entity Address, Address Description Address of principal executive offices      
Phone Fax Number Description Registrant’s telephone number, including area code      
City Area Code 760      
Local Phone Number 788-4700      
Entity Well-known Seasoned Issuer No      
Entity Voluntary Filers No      
Entity Current Reporting Status No      
Entity Interactive Data Current No      
Entity Filer Category Non-accelerated Filer      
Entity Small Business true      
Entity Emerging Growth Company false      
Entity Shell Company false      
Entity Public Float     $ 5,740,523  
Entity Common Stock, Shares Outstanding   22,850,947    
Preferred Stock, Shares Outstanding 11 [1] 11   0
Amendment Flag false      
Document Fiscal Year Focus 2019      
Document Fiscal Period Focus FY      
[1] Par value is less than $0.01