XML 11 R1.htm IDEA: XBRL DOCUMENT v3.24.1
Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Mar. 20, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Period End Date Dec. 31, 2023    
Amendment Flag false    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Trading Symbol BCOW    
Entity Registrant Name 1895 BANCORP OF WISCONSIN, INC.    
Entity Central Index Key 0001847360    
Current Fiscal Year End Date --12-31    
Entity Current Reporting Status Yes    
Entity Shell Company false    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Entity Address, State or Province WI    
Entity Interactive Data Current Yes    
Title of 12(b) Security Common stock, par value $0.01 per share    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   6,014,678  
Entity File Number 001-40609    
Entity Tax Identification Number 61-1993378    
Entity Address, Address Line One 7001 West Edgerton Avenue    
Entity Address, City or Town Greenfield    
Entity Address, Postal Zip Code 53220    
City Area Code 414    
Local Phone Number 421-8200    
Entity Incorporation, State or Country Code MD    
Document Transition Report false    
Document Annual Report true    
Entity Public Float     $ 39.3
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction false    
Auditor Name Wipfli LLP    
Auditor Firm ID 344    
Auditor Location Atlanta, Georgia    
Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE:

Portions of the Proxy Statement for the 2024 Annual Meeting of Shareholders are incorporated by reference in Part III of this Form 10-K.