Annual report pursuant to Section 13 and 15(d)

Cover

v3.22.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2021
Mar. 24, 2022
Jun. 30, 2021
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2021    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2021    
Current Fiscal Year End Date --12-31    
Entity File Number 000-55323    
Entity Registrant Name Mentor Capital, Inc.    
Entity Central Index Key 0001599117    
Entity Tax Identification Number 77-0395098    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 5964 Campus Court    
Entity Address, City or Town Plano    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 75093    
City Area Code 760    
Local Phone Number 788-4700    
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 true    
Elected Not To Use the Extended Transition Period false    
Entity Shell Company false    
Entity Public Float     $ 3,046,031
Entity Common Stock, Shares Outstanding   22,941,357  
ICFR Auditor Attestation Flag false    
Auditor Firm ID 5041    
Auditor Name BF Borgers CPA PC    
Auditor Location Lakewood, CO