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Investment Securities (Details Textual) (USD $)
6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Federal Reserve Bank [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Borrowings outstanding under line of credit facility $ 0us-gaap_LineOfCredit
/ us-gaap_LineOfCreditFacilityAxis
= czwi_FederalReserveBankMember
 
Available-for-sale Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Cash payments received on a security in excess of the security’s book value adjusted for the previously recognized credit portion of OTTI $ 0us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows
/ us-gaap_InformationByCategoryOfDebtSecurityAxis
= us-gaap_AvailableforsaleSecuritiesMember
$ 13,000us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows
/ us-gaap_InformationByCategoryOfDebtSecurityAxis
= us-gaap_AvailableforsaleSecuritiesMember