v3.25.4
Document and Entity Information - shares
 9 Months Ended
Dec. 31, 2025
Feb. 12, 2026
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Dec. 31, 2025  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q3  
Title of 12(b) Security Common Stock  
Security Exchange Name NASDAQ  
Trading Symbol CPBI  
Entity Registrant Name Central Plains Bancshares, Inc.  
Entity Central Index Key 0001979332  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Current Fiscal Year End Date --03-31  
Entity Filer Category Non-accelerated Filer  
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Common Stock, Shares Outstanding   4,205,255
Entity File Number 001-41844  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 93-2239246  
Entity Address, Address Line One 221 South Locust Street  
Entity Address, City or Town Grand Island  
Entity Address, State or Province NE  
Entity Address, Postal Zip Code 68801  
City Area Code 308  
Local Phone Number 382-4000  
Document Quarterly Report true  
Document Transition Report false