$CFSB
CFSB Bancorp, Inc. /MA/ Stock $cfsb

$cfsb Overview Financials Valuation SEC Filings Company Website

2023 Q3 Form 10-K Financial Statement

#000095017023049006 Filed on September 20, 2023

Income Statement

Concept	2023 Q3	2023 Q2	2023
Revenue	$2.732M		$10.68M
YoY Change			15.76%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$60.00K	$60.00K	$240.0K
YoY Change	-6.25%	-116.13%	-5.88%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$926.0K		$1.926M
YoY Change	282.64%		88.82%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$216.0K	$124.0K	$1.747M
YoY Change	-73.5%	-78.47%	347.95%
Income Tax	$93.00K	$19.00K	$301.0K
% Of Pretax Income	43.06%	15.32%	17.23%
Net Earnings	$123.0K	$105.0K	$1.446M
YoY Change	-80.93%	-81.38%	227.15%
Net Earnings / Revenue	4.5%		13.54%
Basic Earnings Per Share	$0.02		$0.23
Diluted Earnings Per Share	$0.02	$0.02	$0.23
COMMON SHARES
Basic Shares Outstanding	6.633M	6.633M	6.276M
Diluted Shares Outstanding	6.282M		6.276M

Balance Sheet

Concept	2023 Q3	2023 Q2	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$6.118M	$6.861M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$3.354M	$4.366M	$4.366M
YoY Change	-22.56%	30.95%	30.95%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$1.100M	$1.079M	$1.079M
YoY Change	-3.42%	0.0%	0.0%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$346.2M	$349.0M	$349.0M
YoY Change	-4.08%	-4.69%	-4.69%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$4.800M	$4.471M	$4.471M
YoY Change	10.22%	35.36%	35.36%
Deferred Revenue
YoY Change
Short-Term Debt	$3.250M	$3.675M	$3.675M
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$8.100M	$8.146M	$8.146M
YoY Change	85.99%	146.62%	146.62%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$1.600M	$1.596M	$1.596M
YoY Change	-1.11%	2.64%	2.64%
Total Long-Term Liabilities	$1.600M	$1.596M	$1.596M
YoY Change	-1.11%	2.64%	2.64%
TOTAL LIABILITIES
Total Short-Term Liabilities	$8.100M	$8.146M	$8.146M
Total Long-Term Liabilities	$1.600M	$1.596M	$1.596M
Total Liabilities	$270.3M	$273.1M	$273.1M
YoY Change	-5.49%	-6.44%	-6.44%
SHAREHOLDERS EQUITY
Retained Earnings	$223.0K	$50.42M
YoY Change	-99.55%	2.95%
Common Stock	$65.00K	$65.00K
YoY Change	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$0.00
YoY Change
Treasury Stock Shares
Shareholders Equity	$75.90M	$75.89M	$75.89M
YoY Change
Total Liabilities & Shareholders Equity	$346.2M	$349.0M	$349.0M
YoY Change	-4.08%	-4.69%	-4.69%

Cashflow Statement

Concept	2023 Q3	2023 Q2	2023
OPERATING ACTIVITIES
Net Income	$123.0K	$105.0K	$1.446M
YoY Change	-80.93%	-81.38%	227.15%
Depreciation, Depletion And Amortization	$60.00K	$60.00K	$240.0K
YoY Change	-6.25%	-116.13%	-5.88%
Cash From Operating Activities	$436.0K	$610.0K	$2.053M
YoY Change	-40.27%	-19.42%	8.97%
INVESTING ACTIVITIES
Capital Expenditures	$0.00	$60.00K	$314.0K
YoY Change	-100.0%	-169.77%	141.54%
Acquisitions
YoY Change
Other Investing Activities	$1.920M	$3.890M	-$6.560M
YoY Change	-119.88%	-142.17%	-81.86%
Cash From Investing Activities	$1.919M	$3.820M	-$6.876M
YoY Change	-119.79%	-141.03%	-81.05%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-3.098M	-2.920M	-19.98M
YoY Change	-55.49%	-198.78%	-178.7%
NET CHANGE
Cash From Operating Activities	436.0K	610.0K	2.053M
Cash From Investing Activities	1.919M	3.820M	-6.876M
Cash From Financing Activities	-3.098M	-2.920M	-19.98M
Net Change In Cash	-743.0K	1.510M	-24.81M
YoY Change	-95.33%	-126.97%	175.29%
FREE CASH FLOW
Cash From Operating Activities	$436.0K	$610.0K	$2.053M
Capital Expenditures	$0.00	$60.00K	$314.0K
Free Cash Flow	$436.0K	$550.0K	$1.739M
YoY Change	-36.81%	-34.76%	-0.86%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--06-30
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0001879103
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount
CY2023	dei	Document Type DocumentType	10-K
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-06-30
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	001-41220
CY2023	dei	Entity Registrant Name EntityRegistrantName	CFSB Bancorp, Inc.
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	X1
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	87-4396534
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	15 Beach Street
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Quincy
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	MA
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	02170
CY2023	dei	City Area Code CityAreaCode	617
CY2023	dei	Local Phone Number LocalPhoneNumber	471-0750
CY2023	dei	Security12b Title Security12bTitle	Stock, Par Value $0.01 Common Per Share
CY2023	dei	Trading Symbol TradingSymbol	CFSB
CY2023	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	true
CY2023	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	true
CY2023	dei	Entity Ex Transition Period EntityExTransitionPeriod	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	false
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2022Q4	dei	Entity Public Float EntityPublicFloat	0
CY2023Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	6632642
CY2023	dei	Entity Listing Par Value Per Share EntityListingParValuePerShare	0.01
CY2023	dei	Auditor Firm AuditorFirmId	392
CY2023	dei	Auditor Name AuditorName	Wolf & Company, P.C
CY2023	dei	Auditor Location AuditorLocation	Boston, Massachusetts
CY2023Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	1486000
CY2022Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	1609000
CY2023Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	5375000
CY2022Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	30058000
CY2023Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6861000
CY2022Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	31667000
CY2023Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	146000
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	199000
CY2023Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	132273000
CY2022Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	133593000
CY2023Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	147902000
CY2022Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	145239000
CY2023Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	381000
CY2022Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	191000
CY2023Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1747000
CY2022Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1747000
CY2023Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	175911000
CY2022Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	172593000
CY2023Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3413000
CY2022Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3334000
CY2023Q2	us-gaap	Interest Receivable InterestReceivable	1363000
CY2022Q2	us-gaap	Interest Receivable InterestReceivable	1265000
CY2023Q2	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	10402000
CY2022Q2	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	10144000
CY2023Q2	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	1079000
CY2022Q2	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	1079000
CY2023Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	953000
CY2022Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0
CY2023Q2	us-gaap	Other Assets OtherAssets	596000
CY2022Q2	us-gaap	Other Assets OtherAssets	472000
CY2023Q2	us-gaap	Assets Assets	349007000
CY2022Q2	us-gaap	Assets Assets	366183000
CY2023Q2	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	32760000
CY2022Q2	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	31168000
CY2023Q2	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	230616000
CY2022Q2	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	255907000
CY2023Q2	us-gaap	Deposits Deposits	263376000
CY2022Q2	us-gaap	Deposits Deposits	287075000
CY2023Q2	us-gaap	Short Term Borrowings ShortTermBorrowings	3675000
CY2022Q2	us-gaap	Short Term Borrowings ShortTermBorrowings	0
CY2023Q2	cfsb	Mortgagors Escrow Accounts MortgagorsEscrowAccounts	1596000
CY2022Q2	cfsb	Mortgagors Escrow Accounts MortgagorsEscrowAccounts	1555000
CY2023Q2	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	962000
CY2022Q2	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0
CY2023Q2	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	3509000
CY2022Q2	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	3303000
CY2023Q2	us-gaap	Liabilities Liabilities	273118000
CY2022Q2	us-gaap	Liabilities Liabilities	291933000
CY2023Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2023Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000
CY2022Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000
CY2023Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2022Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2023Q2	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2022Q2	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2022Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000
CY2023Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000
CY2023Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	6632642
CY2023Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	6632642
CY2022Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	6521642
CY2022Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	6521642
CY2023Q2	us-gaap	Common Stock Value CommonStockValue	65000
CY2022Q2	us-gaap	Common Stock Value CommonStockValue	65000
CY2023Q2	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	27814000
CY2022Q2	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	27720000
CY2023Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	50416000
CY2022Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	48970000
CY2023Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3000
CY2022Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	0
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	240310
CY2022Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	250536
CY2023Q2	cfsb	Earned Unearned Compensation For Esop EarnedUnearnedCompensationForEsop	2403000
CY2022Q2	cfsb	Earned Unearned Compensation For Esop EarnedUnearnedCompensationForEsop	2505000
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	75889000
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	74250000
CY2023Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	349007000
CY2022Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	366183000
CY2023	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	6695000
CY2022	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	6502000
CY2023	cfsb	Interest And Dividend Income Securities Operating Taxable InterestAndDividendIncomeSecuritiesOperatingTaxable	3228000
CY2022	cfsb	Interest And Dividend Income Securities Operating Taxable InterestAndDividendIncomeSecuritiesOperatingTaxable	2153000
CY2023	cfsb	Interest And Dividend Income Securities Operating Tax Exempt InterestAndDividendIncomeSecuritiesOperatingTaxExempt	414000
CY2022	cfsb	Interest And Dividend Income Securities Operating Tax Exempt InterestAndDividendIncomeSecuritiesOperatingTaxExempt	466000
CY2023	us-gaap	Interest Income And Fees Bankers Acceptances Certificates Of Deposit And Commercial Paper InterestIncomeAndFeesBankersAcceptancesCertificatesOfDepositAndCommercialPaper	341000
CY2022	us-gaap	Interest Income And Fees Bankers Acceptances Certificates Of Deposit And Commercial Paper InterestIncomeAndFeesBankersAcceptancesCertificatesOfDepositAndCommercialPaper	103000
CY2023	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10678000
CY2022	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9224000
CY2023	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1872000
CY2022	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1012000
CY2023	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	54000
CY2022	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	8000
CY2023	us-gaap	Interest Expense InterestExpense	1926000
CY2022	us-gaap	Interest Expense InterestExpense	1020000
CY2023	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8752000
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8204000
CY2023	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0
CY2022	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	26000
CY2023	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8752000
CY2022	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8178000
CY2023	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	146000
CY2022	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	127000
CY2023	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	258000
CY2022	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	259000
CY2023	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	0
CY2022	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	56000
CY2023	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	260000
CY2022	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	253000
CY2023	us-gaap	Noninterest Income NoninterestIncome	664000
CY2022	us-gaap	Noninterest Income NoninterestIncome	695000
CY2023	us-gaap	Labor And Related Expense LaborAndRelatedExpense	4517000
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	4097000
CY2023	us-gaap	Occupancy Net OccupancyNet	1028000
CY2022	us-gaap	Occupancy Net OccupancyNet	883000
CY2023	us-gaap	Advertising Expense AdvertisingExpense	185000
CY2022	us-gaap	Advertising Expense AdvertisingExpense	139000
CY2023	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	344000
CY2022	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	350000
CY2023	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	106000
CY2022	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	90000
CY2023	cfsb	Cash And Non Cash Contribution Expense CashAndNonCashContributionExpense	0
CY2022	cfsb	Cash And Non Cash Contribution Expense CashAndNonCashContributionExpense	1554000
CY2023	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	1489000
CY2022	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	1370000
CY2023	us-gaap	Noninterest Expense NoninterestExpense	7669000
CY2022	us-gaap	Noninterest Expense NoninterestExpense	8483000
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1747000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	390000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	301000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-52000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	1446000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	442000
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.08
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.08
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6275819
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5886929
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6275874
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5886929
CY2023	us-gaap	Net Income Loss NetIncomeLoss	1446000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	442000
CY2023	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-5000
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	32000
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	56000
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-5000
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-24000
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-2000
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-7000
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-3000
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-17000
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1443000
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	425000
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	19000
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	74250000
CY2023	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	1446000
CY2023	cfsb	Other Comprehensive Loss OtherComprehensiveLoss	-3000
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	109000
CY2023	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	87000
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	75889000
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	48645000
CY2022	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	442000
CY2022	cfsb	Other Comprehensive Loss OtherComprehensiveLoss	-17000
CY2022	cfsb	Transfer Of Cash From Cfsb To15 Beach Mhc TransferOfCashFromCfsbTo15BeachMhc	-100000
CY2022	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	36000
CY2022	cfsb	Issuance Of Shares In The Intial Public Offering Net Of Expenses IssuanceOfSharesInTheIntialPublicOfferingNetOfExpenses	26445000
CY2022	cfsb	Issuance And Contribution Of Shares To The Colonial Federal Savings Bank Charitable Foundation Inc IssuanceAndContributionOfSharesToTheColonialFederalSavingsBankCharitableFoundationInc	1304000
CY2022	us-gaap	Stock Issued During Period Shares Other StockIssuedDuringPeriodSharesOther	255648
CY2022	us-gaap	Stock Issued During Period Value Purchase Of Assets StockIssuedDuringPeriodValuePurchaseOfAssets	2556000
CY2022	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	51000
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	74250000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	1446000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	442000
CY2023	cfsb	Adjustments For Provision For Loan Losses AdjustmentsForProvisionForLoanLosses	0
CY2022	cfsb	Adjustments For Provision For Loan Losses AdjustmentsForProvisionForLoanLosses	26000
CY2023	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	0
CY2022	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	56000
CY2023	us-gaap	Adjustment For Amortization AdjustmentForAmortization	437000
CY2022	us-gaap	Adjustment For Amortization AdjustmentForAmortization	581000
CY2023	us-gaap	Noncash Contribution Expense NoncashContributionExpense	0
CY2022	us-gaap	Noncash Contribution Expense NoncashContributionExpense	1303000
CY2023	cfsb	Net Change In Deferred Loan Costs And Fees NetChangeInDeferredLoanCostsAndFees	2000
CY2022	cfsb	Net Change In Deferred Loan Costs And Fees NetChangeInDeferredLoanCostsAndFees	-18000
CY2023	cfsb	Increase Decrease In Bank Owned Life Insurance IncreaseDecreaseInBankOwnedLifeInsurance	258000
CY2022	cfsb	Increase Decrease In Bank Owned Life Insurance IncreaseDecreaseInBankOwnedLifeInsurance	259000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-407000
CY2023	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	235000
CY2022	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	255000
CY2023	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	87000
CY2022	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	51000
CY2023	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	109000
CY2022	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	0
CY2023	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	98000
CY2022	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	119000
CY2023	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-91000
CY2022	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-85000
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2053000
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1884000
CY2023	cfsb	Proceed From Maturities Of Certificates Of Deposit ProceedFromMaturitiesOfCertificatesOfDeposit	0
CY2022	cfsb	Proceed From Maturities Of Certificates Of Deposit ProceedFromMaturitiesOfCertificatesOfDeposit	980000
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	48000
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	89000
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	2031000
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	13668000
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	22246000
CY2023	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	16768000
CY2022	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	62944000
CY2023	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	3320000
CY2022	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-1814000
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	314000
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	130000
CY2023	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	0
CY2022	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	635000
CY2023	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	190000
CY2022	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	0
CY2022	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	262000
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-6876000
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-36287000
CY2023	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-23699000
CY2022	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	2401000
CY2023	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	3675000
CY2022	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-918000
CY2023	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	0
CY2022	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	26482000
CY2023	cfsb	Payments For Purchase Of Common Stock By Employee Stock Ownership Plans PaymentsForPurchaseOfCommonStockByEmployeeStockOwnershipPlans	0
CY2022	cfsb	Payments For Purchase Of Common Stock By Employee Stock Ownership Plans PaymentsForPurchaseOfCommonStockByEmployeeStockOwnershipPlans	2556000
CY2023	cfsb	Increase Decrease In Mortgagors Escrow Accounts IncreaseDecreaseInMortgagorsEscrowAccounts	41000
CY2022	cfsb	Increase Decrease In Mortgagors Escrow Accounts IncreaseDecreaseInMortgagorsEscrowAccounts	-17000
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-19983000
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	25392000
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-24806000
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-9011000
CY2022Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	31667000
CY2021Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	40678000
CY2023Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6861000
CY2022Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	31667000
CY2023	us-gaap	Interest Paid Net InterestPaidNet	1926000
CY2022	us-gaap	Interest Paid Net InterestPaidNet	1020000
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	540000
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	381000
CY2023	cfsb	Adoption Of Asu201602 AdoptionOfAsu201602	1044000
CY2022	cfsb	Adoption Of Asu201602 AdoptionOfAsu201602	0
CY2023Q2	cfsb	Number Common Stock Shares Sold NumberCommonStockSharesSold	2804306
CY2023Q2	cfsb	Stated Value Per Share For Stock Sold To The Public StatedValuePerShareForStockSoldToThePublic	10
CY2023	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	272945
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<p style="text-indent:5%;font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:6pt;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:'Times New Roman',serif;font-style:italic;min-width:fit-content;">Use of estimates</span></p><p style="text-indent:5%;font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:6pt;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-weight:normal;font-size:10pt;font-family:'Times New Roman',serif;min-width:fit-content;">In preparing consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated balance sheet and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. A material estimate that is particularly susceptible to significant change in the near term is the allowance for loan losses.</span></p>
CY2023	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<p style="text-indent:5%;font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:6pt;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:'Times New Roman',serif;font-style:italic;min-width:fit-content;">Reclassification</span></p><p style="text-indent:5%;font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:6pt;text-align:justify;"><span style="color:#000000;white-space:pre-wrap;font-weight:normal;font-size:10pt;font-family:'Times New Roman',serif;min-width:fit-content;">Certain amounts in the 2022 consolidated financial statements have been reclassified to conform to the 2023 presentation.</span></p>
CY2023Q2	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.80
CY2023Q2	cfsb	Interest Penalties InterestPenalties	0
CY2022Q2	cfsb	Interest Penalties InterestPenalties	0
CY2023Q2	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Six Through Ten Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	34185000
CY2023Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	0
CY2023Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	0
CY2023Q2	us-gaap	Heldtomaturity Securities Debt Maturities Rolling After Ten Years Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost	22559000
CY2023Q2	us-gaap	Held To Maturity Securities Debt Maturities Rolling After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue	17295000
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-17000
CY2023Q2	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	0
CY2023Q2	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	0
CY2023Q2	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Amortized Cost Basis HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	101282000
CY2023Q2	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	89153000
CY2023Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	151000
CY2023Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	146000
CY2023Q2	us-gaap	Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss	147902000
CY2023Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	132273000
CY2020Q1	cfsb	Federal Reserve Requirement Ratio FederalReserveRequirementRatio	0
CY2023Q2	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	0
CY2022Q2	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	0
CY2023Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	151000
CY2023Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0
CY2023Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	5000
CY2023Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	146000
CY2023Q2	us-gaap	Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss	147902000
CY2023Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	3000
CY2023Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	15632000
CY2023Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	132273000
CY2022Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	199000
CY2022Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0
CY2022Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	0
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	199000
CY2022Q2	us-gaap	Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss	145239000
CY2022Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	69000
CY2022Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	11715000
CY2022Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	133593000
CY2023Q2	cfsb	Securityownedandpledgedascollateralamortizedcost Securityownedandpledgedascollateralamortizedcost	14657000
CY2023Q2	us-gaap	Security Owned And Pledged As Collateral Associated Liabilities Fair Value SecurityOwnedAndPledgedAsCollateralAssociatedLiabilitiesFairValue	12410000
CY2023Q2	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	0
CY2023Q2	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	0
CY2023Q2	us-gaap	Heldtomaturity Securities Debt Maturities Next Rolling Twelve Months Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost	7770000
CY2023Q2	us-gaap	Held To Maturity Securities Debt Maturities Next Rolling Twelve Months Fair Value HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	7686000
CY2023Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	0
CY2023Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	0
CY2023Q2	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Two Through Five Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost	31738000
CY2023Q2	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Two Through Five Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	29987000
CY2023Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	0
CY2023Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	0
CY2023Q2	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost	39215000
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	2000
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	71000
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	3000
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	67000
CY2023Q2	cfsb	Debtsecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositions Debtsecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositions	279
CY2023	cfsb	Debtsecuritiesinunrealizedlosspositionspercentageofdepreciationapplicable Debtsecuritiesinunrealizedlosspositionspercentageofdepreciationapplicable	0.109
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	2031000
CY2023Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	178009000
CY2022Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	174689000
CY2023Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1747000
CY2022Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1747000
CY2023Q2	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	351000
CY2022Q2	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	349000
CY2023Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	175911000
CY2022Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	172593000
CY2023	us-gaap	Loans And Leases Receivable Related Parties Period Increase Decrease LoansAndLeasesReceivableRelatedPartiesPeriodIncreaseDecrease	2100000
CY2022	us-gaap	Loans And Leases Receivable Related Parties Period Increase Decrease LoansAndLeasesReceivableRelatedPartiesPeriodIncreaseDecrease	3000000
CY2022Q2	cfsb	Related Party Loan Outstanding RelatedPartyLoanOutstanding	3047000
CY2021Q2	cfsb	Related Party Loan Outstanding RelatedPartyLoanOutstanding	2544000
CY2023	cfsb	Related Parties New Loans RelatedPartiesNewLoans	0
CY2022	cfsb	Related Parties New Loans RelatedPartiesNewLoans	1211000
CY2023	cfsb	Draws Draws	3000
CY2022	cfsb	Draws Draws	0
CY2023	us-gaap	Payments To Fund Longterm Loans To Related Parties PaymentsToFundLongtermLoansToRelatedParties	482000
CY2022	us-gaap	Payments To Fund Longterm Loans To Related Parties PaymentsToFundLongtermLoansToRelatedParties	0
CY2023	us-gaap	Proceeds From Repayments Of Related Party Debt ProceedsFromRepaymentsOfRelatedPartyDebt	-490000
CY2022	us-gaap	Proceeds From Repayments Of Related Party Debt ProceedsFromRepaymentsOfRelatedPartyDebt	-708000
CY2023Q2	cfsb	Related Party Loan Outstanding RelatedPartyLoanOutstanding	2078000
CY2022Q2	cfsb	Related Party Loan Outstanding RelatedPartyLoanOutstanding	3047000
CY2022Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1747000
CY2023	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0
CY2023	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	0
CY2023	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	0
CY2023Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1747000
CY2021Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1722000
CY2022	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	26000
CY2022	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	-1000
CY2022	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	0
CY2022Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1747000
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	0
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	1747000
CY2023Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1747000
CY2023Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	0
CY2023Q2	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	178009000
CY2023Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	178009000
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	0
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	1747000
CY2022Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	1747000
CY2022Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	0
CY2022Q2	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	174689000
CY2022Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	174689000
CY2023	us-gaap	Loans And Leases Receivable Impaired Description LoansAndLeasesReceivableImpairedDescription	Management is required to perform a discounted cash flow calculation to determine the amount of impairment reserve required on any troubled debt restructurings
CY2023Q2	cfsb	Loans And Leases Receivables Gross Carrying Amount LoansAndLeasesReceivablesGrossCarryingAmount	178009000
CY2022Q2	cfsb	Loans And Leases Receivables Gross Carrying Amount LoansAndLeasesReceivablesGrossCarryingAmount	174689000
CY2023Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	5116000
CY2022Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4937000
CY2023Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1703000
CY2022Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1603000
CY2023Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3413000
CY2022Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3334000
CY2023	us-gaap	Depreciation And Amortization DepreciationAndAmortization	235000
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	255000
CY2023Q2	cfsb	Deposits Negotiable Order Of Withdrawal Now And Demand Deposit Accounts DepositsNegotiableOrderOfWithdrawalNowAndDemandDepositAccounts	61538000
CY2022Q2	cfsb	Deposits Negotiable Order Of Withdrawal Now And Demand Deposit Accounts DepositsNegotiableOrderOfWithdrawalNowAndDemandDepositAccounts	64163000
CY2023Q2	cfsb	Regular And Other Deposits RegularAndOtherDeposits	64184000
CY2022Q2	cfsb	Regular And Other Deposits RegularAndOtherDeposits	75774000
CY2023Q2	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	26995000
CY2022Q2	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	47010000
CY2023Q2	cfsb	Non Certificate Deposits NonCertificateDeposits	152717000
CY2022Q2	cfsb	Non Certificate Deposits NonCertificateDeposits	186947000
CY2023Q2	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	24340000
CY2022Q2	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	24608000
CY2023Q2	cfsb	Time Deposits Less Than Fdic Insurance Limit TimeDepositsLessThanFdicInsuranceLimit	86319000
CY2022Q2	cfsb	Time Deposits Less Than Fdic Insurance Limit TimeDepositsLessThanFdicInsuranceLimit	75520000
CY2023Q2	us-gaap	Time Deposits TimeDeposits	110659000
CY2022Q2	us-gaap	Time Deposits TimeDeposits	100128000
CY2023Q2	us-gaap	Deposits Deposits	263376000
CY2022Q2	us-gaap	Deposits Deposits	287075000
CY2023Q2	cfsb	Time Deposit Maturities Within Three Months TimeDepositMaturitiesWithinThreeMonths	11171000
CY2023Q2	cfsb	Time Deposits Weighted Average Interest Rate Maturities Within Three Months1 TimeDepositsWeightedAverageInterestRateMaturitiesWithinThreeMonths1	0.0111
CY2022Q2	cfsb	Time Deposit Maturities Within Three Months TimeDepositMaturitiesWithinThreeMonths	24873000
CY2022Q2	cfsb	Time Deposits Weighted Average Interest Rate Maturities Within Three Months1 TimeDepositsWeightedAverageInterestRateMaturitiesWithinThreeMonths1	0.0045
CY2023Q2	cfsb	Time Deposit Maturities Over Three Months To One Year TimeDepositMaturitiesOverThreeMonthsToOneYear	83590000
CY2023Q2	cfsb	Time Deposits Weighted Average Interest Rate Maturities Over Three Months To One Year1 TimeDepositsWeightedAverageInterestRateMaturitiesOverThreeMonthsToOneYear1	0.0323
CY2022Q2	cfsb	Time Deposit Maturities Over Three Months To One Year TimeDepositMaturitiesOverThreeMonthsToOneYear	53974000
CY2022Q2	cfsb	Time Deposits Weighted Average Interest Rate Maturities Over Three Months To One Year1 TimeDepositsWeightedAverageInterestRateMaturitiesOverThreeMonthsToOneYear1	0.0077
CY2023Q2	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	11813000
CY2023Q2	us-gaap	Time Deposits Weighted Average Interest Rate Maturities Year Two TimeDepositsWeightedAverageInterestRateMaturitiesYearTwo	0.0233
CY2022Q2	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	14307000
CY2022Q2	us-gaap	Time Deposits Weighted Average Interest Rate Maturities Year Two TimeDepositsWeightedAverageInterestRateMaturitiesYearTwo	0.0096
CY2023Q2	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	1900000
CY2023Q2	us-gaap	Time Deposits Weighted Average Interest Rate Maturities Year Three TimeDepositsWeightedAverageInterestRateMaturitiesYearThree	0.0061
CY2022Q2	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	5277000
CY2022Q2	us-gaap	Time Deposits Weighted Average Interest Rate Maturities Year Three TimeDepositsWeightedAverageInterestRateMaturitiesYearThree	0.0092
CY2023Q2	cfsb	Time Deposit Maturities Year Four And Five TimeDepositMaturitiesYearFourAndFive	2185000
CY2023Q2	cfsb	Time Deposits Weighted Average Interest Rate Maturities Year Four And Five TimeDepositsWeightedAverageInterestRateMaturitiesYearFourAndFive	0.0249
CY2022Q2	cfsb	Time Deposit Maturities Year Four And Five TimeDepositMaturitiesYearFourAndFive	1697000
CY2022Q2	cfsb	Time Deposits Weighted Average Interest Rate Maturities Year Four And Five TimeDepositsWeightedAverageInterestRateMaturitiesYearFourAndFive	0.0065
CY2023Q2	us-gaap	Time Deposits TimeDeposits	110659000
CY2023Q2	cfsb	Time Deposits Weighted Average Interest Rate TimeDepositsWeightedAverageInterestRate	0.0286
CY2022Q2	us-gaap	Time Deposits TimeDeposits	100128000
CY2022Q2	cfsb	Time Deposits Weighted Average Interest Rate TimeDepositsWeightedAverageInterestRate	0.0073
CY2023Q2	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	3700000
CY2023Q2	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0525
CY2022Q2	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0
CY2023	us-gaap	Assets Under Management Average Balance AssetsUnderManagementAverageBalance	1037000
CY2022	us-gaap	Assets Under Management Average Balance AssetsUnderManagementAverageBalance	278000
CY2023	us-gaap	Line Of Credit Facility Maximum Monthend Outstanding Amount LineOfCreditFacilityMaximumMonthendOutstandingAmount	5300000
CY2022	us-gaap	Line Of Credit Facility Maximum Monthend Outstanding Amount LineOfCreditFacilityMaximumMonthendOutstandingAmount	717000
CY2023	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Description Of Collateral Pledged FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresDescriptionOfCollateralPledged	All borrowings from the FHLB are secured by a blanket lien on qualified collateral, defined principally as first mortgage loans on owner-occupied 1-4 family residential property.
CY2022Q2	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	0
CY2023Q2	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	0
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	268000
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	313000
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	31000
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	42000
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	299000
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	355000
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-62000
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-322000
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-0
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-200000
CY2023	cfsb	Deferred Tax Expense Valuation Allowance DeferredTaxExpenseValuationAllowance	64000
CY2022	cfsb	Deferred Tax Expense Valuation Allowance DeferredTaxExpenseValuationAllowance	115000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-407000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	301000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-52000
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	367000
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	82000
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-22000
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	120000
CY2023	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	-85000
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	-96000
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	31000
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	34000
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	7000
CY2023	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-43000
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1000
CY2023	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	64000
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	115000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	301000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-52000
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.172
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.133
CY2023Q2	cfsb	Deferred Tax Assets Allowance For Loan Losses DeferredTaxAssetsAllowanceForLoanLosses	466000
CY2022Q2	cfsb	Deferred Tax Assets Allowance For Loan Losses DeferredTaxAssetsAllowanceForLoanLosses	466000
CY2023Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	360000
CY2022Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	328000
CY2023Q2	cfsb	Deferred Tax Assets Esop DeferredTaxAssetsEsop	23000
CY2022Q2	cfsb	Deferred Tax Assets Esop DeferredTaxAssetsEsop	14000
CY2023Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	22000
CY2022Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	0
CY2023Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	1000
CY2022Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	0
CY2023Q2	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	2000
CY2022Q2	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	0
CY2023Q2	cfsb	Deferred Tax Assets Depreciation And Amortization DeferredTaxAssetsDepreciationAndAmortization	10000
CY2022Q2	cfsb	Deferred Tax Assets Depreciation And Amortization DeferredTaxAssetsDepreciationAndAmortization	0
CY2023Q2	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	374000
CY2022Q2	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	403000
CY2023Q2	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1258000
CY2022Q2	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1211000
CY2023Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	179000
CY2022Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	115000
CY2023Q2	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1079000
CY2022Q2	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1096000
CY2023Q2	cfsb	Deferred Tax Liabilities Depreciation And Amortization DeferredTaxLiabilitiesDepreciationAndAmortization	0
CY2022Q2	cfsb	Deferred Tax Liabilities Depreciation And Amortization DeferredTaxLiabilitiesDepreciationAndAmortization	17000
CY2023Q2	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	0
CY2022Q2	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	17000
CY2023Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1079000
CY2022Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1079000
CY2022Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1079000
CY2021Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	665000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-407000
CY2023	cfsb	Deferred Tax Effects Of Net Unrealized Gain On Available For Sale Securities DeferredTaxEffectsOfNetUnrealizedGainOnAvailableForSaleSecurities	2000
CY2022	cfsb	Deferred Tax Effects Of Net Unrealized Gain On Available For Sale Securities DeferredTaxEffectsOfNetUnrealizedGainOnAvailableForSaleSecurities	7000
CY2023Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1079000
CY2022Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1079000
CY2023Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	179000
CY2022Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	115000
CY2023Q2	cfsb	Federal Income Tax Reserve For Loan Losses FederalIncomeTaxReserveForLoanLosses	2582000
CY2023Q2	cfsb	Income Tax Reserve Used Percentage IncomeTaxReserveUsedPercentage	1.50
CY2023	cfsb	Deferred Income Tax Liability Not Recognized DeferredIncomeTaxLiabilityNotRecognized	726000
CY2023	us-gaap	Income Tax Examination Year Under Examination IncomeTaxExaminationYearUnderExamination	2019
CY2023Q2	us-gaap	Banking Regulation Capital Conservation Buffer Capital Conserved Minimum BankingRegulationCapitalConservationBufferCapitalConservedMinimum	0.25
CY2023Q2	us-gaap	Capital Capital	65141000
CY2023Q2	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.329
CY2023Q2	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	15850000
CY2023Q2	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.08
CY2023Q2	us-gaap	Capital Required To Be Well Capitalized CapitalRequiredToBeWellCapitalized	19813000
CY2023Q2	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.10
CY2023Q2	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	63394000
CY2023Q2	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.32
CY2023Q2	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	8916000
CY2023Q2	us-gaap	Banking Regulation Common Equity Tier One Risk Based Capital Ratio Capital Adequacy Minimum BankingRegulationCommonEquityTierOneRiskBasedCapitalRatioCapitalAdequacyMinimum	0.045
CY2023Q2	us-gaap	Common Equity Tier One Capital Required To Be Well Capitalized CommonEquityTierOneCapitalRequiredToBeWellCapitalized	12878000
CY2023Q2	us-gaap	Banking Regulation Common Equity Tier One Risk Based Capital Ratio Well Capitalized Minimum BankingRegulationCommonEquityTierOneRiskBasedCapitalRatioWellCapitalizedMinimum	0.065
CY2023Q2	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	63394000
CY2023Q2	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.32
CY2023Q2	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	11888000
CY2023Q2	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.06
CY2023Q2	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	15850000
CY2023Q2	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.08
CY2023Q2	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	63394000
CY2023Q2	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.182
CY2023Q2	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	13950000
CY2023Q2	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.04
CY2023Q2	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized TierOneLeverageCapitalRequiredToBeWellCapitalized	17438000
CY2023Q2	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	0.05
CY2022Q2	us-gaap	Capital Capital	65237000
CY2022Q2	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.349
CY2022Q2	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	14936000
CY2022Q2	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.08
CY2022Q2	us-gaap	Capital Required To Be Well Capitalized CapitalRequiredToBeWellCapitalized	18670000
CY2022Q2	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.10
CY2022Q2	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	63490000
CY2022Q2	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.34
CY2022Q2	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	8401000
CY2022Q2	us-gaap	Banking Regulation Common Equity Tier One Risk Based Capital Ratio Capital Adequacy Minimum BankingRegulationCommonEquityTierOneRiskBasedCapitalRatioCapitalAdequacyMinimum	0.045
CY2022Q2	us-gaap	Common Equity Tier One Capital Required To Be Well Capitalized CommonEquityTierOneCapitalRequiredToBeWellCapitalized	12135000
CY2022Q2	us-gaap	Banking Regulation Common Equity Tier One Risk Based Capital Ratio Well Capitalized Minimum BankingRegulationCommonEquityTierOneRiskBasedCapitalRatioWellCapitalizedMinimum	0.065
CY2022Q2	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	63490000
CY2022Q2	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.34
CY2022Q2	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	11202000
CY2022Q2	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.06
CY2022Q2	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	14936000
CY2022Q2	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.08
CY2022Q2	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	63490000
CY2022Q2	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.174
CY2022Q2	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	14580000
CY2022Q2	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.04
CY2022Q2	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized TierOneLeverageCapitalRequiredToBeWellCapitalized	18225000
CY2022Q2	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	0.05
CY2023	us-gaap	Concentration Risk Credit Risk Financial Instruments Off Balance Sheet Risk ConcentrationRiskCreditRiskFinancialInstrumentsOffBalanceSheetRisk	Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The commitments for construction loans and lines of credit may expire without being drawn upon. Therefore, the total commitment amounts do not necessarily represent future cash requirements.
CY2023Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	953000
CY2023Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y10M17D
CY2023Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0356
CY2023Q2	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	117000
CY2023Q2	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	117000
CY2023Q2	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	117000
CY2023Q2	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	119000
CY2023Q2	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	134000
CY2023Q2	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	522000
CY2023Q2	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	1126000
CY2023Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	164000
CY2023Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	962000
CY2023	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	136000
CY2022	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	93000
CY2023	us-gaap	Proceeds From Lease Payments ProceedsFromLeasePayments	117000
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	255648
CY2023	us-gaap	Debt Instrument Term DebtInstrumentTerm	P25Y
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Debt Structure Direct Loan Amount EmployeeStockOwnershipPlanESOPDebtStructureDirectLoanAmount	2500000
CY2023	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	87000
CY2022	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	51000
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Allocated Shares EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares	15338
CY2022Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Allocated Shares EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares	5112
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	240310
CY2022Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	250536
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	255648
CY2022Q2	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	255648
CY2023Q2	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	6861000
CY2023Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	146000
CY2023Q2	cfsb	Securities Held To Maturity SecuritiesHeldToMaturity	132273000
CY2023Q2	us-gaap	Investment In Federal Home Loan Bank Stock Fair Value Disclosure InvestmentInFederalHomeLoanBankStockFairValueDisclosure	381000
CY2023Q2	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	157505000
CY2023Q2	us-gaap	Interest Receivable InterestReceivable	1363000
CY2023Q2	us-gaap	Deposits Fair Value Disclosure DepositsFairValueDisclosure	241711000
CY2023Q2	us-gaap	Shortterm Debt Fair Value ShorttermDebtFairValue	3667000
CY2022Q2	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	31667000
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	199000
CY2022Q2	cfsb	Securities Held To Maturity SecuritiesHeldToMaturity	133593000
CY2022Q2	us-gaap	Investment In Federal Home Loan Bank Stock Fair Value Disclosure InvestmentInFederalHomeLoanBankStockFairValueDisclosure	191000
CY2022Q2	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	161098000
CY2022Q2	us-gaap	Interest Receivable InterestReceivable	1265000
CY2022Q2	us-gaap	Deposits Fair Value Disclosure DepositsFairValueDisclosure	268039000
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	273000
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P5Y
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod	P10Y
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.293
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y6M
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.037
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	3170
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	273000
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	8.33
CY2023	cfsb	Sharebasedcompensationarrangementbysharebasedpaymentawardoptionsgrantedweightedaverageremainingcontractualterm1 Sharebasedcompensationarrangementbysharebasedpaymentawardoptionsgrantedweightedaverageremainingcontractualterm1	P9Y11M12D
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	273000
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	8.33
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P9Y8M12D
CY2023Q2	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	812000
CY2023	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P4Y8M12D
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	111000
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	8.35
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	111000
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	8.35
CY2023Q2	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	870000
CY2023	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P4Y8M12D
CY2023	cfsb	Increase In Due From Colonial Federal Savings Bank IncreaseInDueFromColonialFederalSavingsBank	-614000

Files In Submission

Name	View Source	Status
cfsb-20230630_cal.xml	Edgar Link	unprocessable
cfsb-20230630_def.xml	Edgar Link	unprocessable
cfsb-20230630_lab.xml	Edgar Link	unprocessable
0000950170-23-049006-index-headers.html	Edgar Link	pending
0000950170-23-049006-index.html	Edgar Link	pending
0000950170-23-049006.txt	Edgar Link	pending
0000950170-23-049006-xbrl.zip	Edgar Link	pending
cfsb-20230630.htm	Edgar Link	pending
cfsb-20230630.xsd	Edgar Link	pending
cfsb-ex23_1.htm	Edgar Link	pending
cfsb-ex31_1.htm	Edgar Link	pending
cfsb-ex31_2.htm	Edgar Link	pending
cfsb-ex32_1.htm	Edgar Link	pending
cfsb-ex32_2.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
img28444125_0.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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FilingSummary.xml	Edgar Link	unprocessable
cfsb-20230630_pre.xml	Edgar Link	unprocessable
cfsb-20230630_htm.xml	Edgar Link	completed
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
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R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$CFSB
CFSB Bancorp, Inc. /MA/ Stock $cfsb

2023 Q3 Form 10-K Financial Statement

#000095017023049006 Filed on September 20, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CFSB CFSB Bancorp, Inc. /MA/ Stock $cfsb

2023 Q3 Form 10-K Financial Statement

#000095017023049006 Filed on September 20, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CFSB
CFSB Bancorp, Inc. /MA/ Stock $cfsb