XML 11 R1.htm IDEA: XBRL DOCUMENT v3.22.1
Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2021
Mar. 29, 2022
Jun. 30, 2021
Document Information Line Items      
Entity Registrant Name TECTONIC FINANCIAL, INC.    
Trading Symbol TECTP    
Document Type 10-K    
Current Fiscal Year End Date --12-31    
Entity Common Stock, Shares Outstanding   7,056,633  
Entity Public Float     $ 0
Amendment Flag false    
Entity Central Index Key 0001766526    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date Dec. 31, 2021    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Shell Company false    
Entity Ex Transition Period true    
ICFR Auditor Attestation Flag true    
Document Annual Report true    
Document Transition Report false    
Entity File Number 001-38910    
Entity Incorporation, State or Country Code TX    
Entity Address, State or Province TX    
Entity Tax Identification Number 82-0764846    
Entity Address, Address Line One 16200 Dallas Parkway, Suite 190    
Entity Address, City or Town Dallas    
Entity Address, Postal Zip Code 75248    
City Area Code 972    
Local Phone Number 720-9000    
Title of 12(b) Security Series B preferred stock, $0.01 par value per share    
Security Exchange Name NASDAQ    
Entity Interactive Data Current Yes    
Auditor Name Whitley Penn LLP    
Auditor Location Dallas, Texas    
Auditor Firm ID 726