v3.23.1
Document and Entity Information
Mar. 16, 2023
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001752036
Document Type 8-K
Document Period End Date Mar. 16, 2023
Entity Registrant Name CALIFORNIA BANCORP
Entity Incorporation State Country Code CA
Entity File Number 001-39242
Entity Tax Identification Number 82-1751097
Entity Address, Address Line One 1300 Clay Street
Entity Address, Address Line Two Suite 500
Entity Address, City or Town Oakland
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94612
City Area Code (510)
Local Phone Number 457-3737
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock
Trading Symbol CALB
Entity Address, Country CA
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Entity Ex Transition Period false