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Document And Entity Information
Jan. 09, 2026
Document Information [Line Items]  
Entity, Registrant Name ECB BANCORP, INC.
Document, Type 8-K
Document, Period End Date Jan. 09, 2026
Entity, Incorporation, State or Country Code MD
Entity, File Number 001-41456
Entity, Tax Identification Number 88-1502079
Entity, Address, Address Line One 419 Broadway
Entity, Address, City or Town Everett
Entity, Address, State or Province MA
Entity, Address, Postal Zip Code 02149
City Area Code 617
Local Phone Number 387-1110
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 ECBK
Security Exchange Name NASDAQ
Entity, Emerging Growth Company true
Entity, Ex Transition Period false
Amendment Flag false
Entity, Central Index Key 0001914605