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Document And Entity Information
Dec. 22, 2021
Document Information [Line Items]  
Entity, Registrant Name PATRIOT NATIONAL BANCORP, INC.
Document, Type 8-K
Document, Period End Date Dec. 22, 2021
Entity, Incorporation, State or Country Code CT
Entity, File Number 000-29599
Entity, Tax Identification Number 06-1559137
Entity, Address, Address Line One 900 Bedford Street
Entity, Address, City or Town Stamford
Entity, Address, State or Province CT
Entity, Address, Postal Zip Code 06901
City Area Code 203
Local Phone Number 324-7500
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity, Emerging Growth Company false
Title of 12(b) Security Common Stock
Trading Symbol PNBK
Security Exchange Name NASDAQ
Amendment Flag false
Entity, Central Index Key 0001098146