XML 14 R1.htm IDEA: XBRL DOCUMENT v3.21.1
Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Mar. 24, 2021
Cover [Abstract]    
Document Type 10-K  
Document Period End Date Dec. 31, 2020  
Amendment Flag false  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus FY  
Trading Symbol BCOW  
Entity Registrant Name 1895 Bancorp of Wisconsin, Inc.  
Entity Central Index Key 0001751692  
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  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   4,851,901
Entity File Number 001-38778  
Entity Tax Identification Number 83-3078306  
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 X1  
Document Transition Report false  
Document Annual Report true  
Entity Public Float $ 21.2  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
ICFR Auditor Attestation Flag false  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE:​​​​​​​
(1) Proxy Statement for the 2020 Annual Meeting of Stockholders of the Registrant (Part III).​​​​​​​