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Cover
Feb. 16, 2022
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Feb. 16, 2022
Entity File Number 000-29599
Entity Registrant Name PATRIOT NATIONAL BANCORP, INC.
Entity Central Index Key 0001098146
Entity Tax Identification Number 06-1559137
Entity Incorporation, State or Country Code CT
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 252-5900
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol PNBK
Security Exchange Name NASDAQ
Entity Emerging Growth Company false