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

$cfsb Overview Financials Valuation SEC Filings Company Website

2024 Q3 Form 10-K Financial Statement

#000095017024107819 Filed on September 18, 2024

Income Statement

Concept	2024 Q3	2024 Q2	2024
Revenue	$3.219M		$11.67M
YoY Change	17.83%		9.3%
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	$62.00K	$62.00K	$238.0K
YoY Change	3.33%	3.33%	-0.83%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$13.00K	$54.00K	-$6.000K
YoY Change	-93.98%	-56.45%	-100.34%
Income Tax	$19.00K	-$106.0K	-$39.00K
% Of Pretax Income	146.15%	-196.3%
Net Earnings	-$6.000K	$160.0K	$33.00K
YoY Change	-104.88%	52.38%	-97.72%
Net Earnings / Revenue	-0.19%		0.28%
Basic Earnings Per Share	$0.00		$0.01
Diluted Earnings Per Share	$0.00	$0.03	$0.01
COMMON SHARES
Basic Shares Outstanding	6.621M	6.633M	6.292M
Diluted Shares Outstanding	6.295M		6.292M

Balance Sheet

Concept	2024 Q3	2024 Q2	2024
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$30.67M	$26.96M
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	$4.022M	$3.246M	$4.106M
YoY Change	19.92%	-25.65%	-5.96%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$1.243M	$1.245M	$1.245M
YoY Change	13.0%	15.38%	15.38%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$364.5M	$363.4M	$363.4M
YoY Change	5.28%	4.14%	4.14%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$4.841M	$4.673M	$4.673M
YoY Change	0.85%	4.52%	4.52%
Deferred Revenue
YoY Change
Short-Term Debt	$10.35M	$10.35M	$10.35M
YoY Change	218.46%	181.63%	181.63%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$15.19M	$15.02M	$15.02M
YoY Change	87.54%	84.42%	84.42%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$1.590M	$1.525M	$1.525M
YoY Change	-0.63%	-4.45%	-4.45%
Total Long-Term Liabilities	$1.590M	$1.525M	$1.525M
YoY Change	-0.63%	-4.45%	-4.45%
TOTAL LIABILITIES
Total Short-Term Liabilities	$15.19M	$15.02M	$15.02M
Total Long-Term Liabilities	$1.590M	$1.525M	$1.525M
Total Liabilities	$288.5M	$287.4M	$287.4M
YoY Change	6.71%	5.23%	5.23%
SHAREHOLDERS EQUITY
Retained Earnings	$50.22M	$50.23M
YoY Change	22420.18%	-0.38%
Common Stock	$65.00K	$65.00K
YoY Change	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$195.0K	$78.00K
YoY Change
Treasury Stock Shares
Shareholders Equity	$76.04M	$76.05M	$76.05M
YoY Change
Total Liabilities & Shareholders Equity	$364.5M	$363.4M	$363.4M
YoY Change	5.28%	4.14%	4.14%

Cashflow Statement

Concept	2024 Q3	2024 Q2	2024
OPERATING ACTIVITIES
Net Income	-$6.000K	$160.0K	$33.00K
YoY Change	-104.88%	52.38%	-97.72%
Depreciation, Depletion And Amortization	$62.00K	$62.00K	$238.0K
YoY Change	3.33%	3.33%	-0.83%
Cash From Operating Activities	$366.0K	$308.0K	$404.0K
YoY Change	-16.06%	-49.51%	-80.32%
INVESTING ACTIVITIES
Capital Expenditures	$2.000K	$40.00K	$71.00K
YoY Change		-33.33%	-77.39%
Acquisitions
YoY Change
Other Investing Activities	$2.567M	-$97.00K	$5.774M
YoY Change	33.7%	-102.49%	-188.02%
Cash From Investing Activities	$2.565M	-$137.0K	$5.703M
YoY Change	33.66%	-103.59%	-182.94%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	777.0K	5.124M	13.99M
YoY Change	-125.08%	-275.48%	-170.01%
NET CHANGE
Cash From Operating Activities	366.0K	308.0K	404.0K
Cash From Investing Activities	2.565M	-137.0K	5.703M
Cash From Financing Activities	777.0K	5.124M	13.99M
Net Change In Cash	3.708M	5.295M	20.10M
YoY Change	-599.06%	250.66%	-181.02%
FREE CASH FLOW
Cash From Operating Activities	$366.0K	$308.0K	$404.0K
Capital Expenditures	$2.000K	$40.00K	$71.00K
Free Cash Flow	$364.0K	$268.0K	$333.0K
YoY Change	-16.51%	-51.27%	-80.85%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2024	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2024	dei	Amendment Flag AmendmentFlag	false
CY2024	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--06-30
CY2024	dei	Entity Central Index Key EntityCentralIndexKey	0001879103
CY2024	dei	Document Type DocumentType	10-K
CY2024	dei	Document Annual Report DocumentAnnualReport	true
CY2024	dei	Document Period End Date DocumentPeriodEndDate	2024-06-30
CY2024	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2024
CY2024	dei	Document Transition Report DocumentTransitionReport	false
CY2024	dei	Entity File Number EntityFileNumber	001-41220
CY2024	dei	Entity Registrant Name EntityRegistrantName	CFSB Bancorp, Inc.
CY2024	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	X1
CY2024	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	87-4396534
CY2024	dei	Entity Address Address Line1 EntityAddressAddressLine1	15 Beach Street
CY2024	dei	Entity Address City Or Town EntityAddressCityOrTown	Quincy
CY2024	dei	Entity Address State Or Province EntityAddressStateOrProvince	MA
CY2024	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	02170
CY2024	dei	City Area Code CityAreaCode	617
CY2024	dei	Local Phone Number LocalPhoneNumber	471-0750
CY2024	dei	Security12b Title Security12bTitle	Stock, Par Value $0.01 Common Per Share
CY2024	dei	Trading Symbol TradingSymbol	CFSB
CY2024	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2024	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2024	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2024	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2024	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2024	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	true
CY2024	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2024	dei	Entity Small Business EntitySmallBusiness	true
CY2024	dei	Entity Ex Transition Period EntityExTransitionPeriod	false
CY2024	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	false
CY2024	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2024	dei	Entity Shell Company EntityShellCompany	false
CY2023Q4	dei	Entity Public Float EntityPublicFloat	17400000
CY2024Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	6621152
CY2024	dei	Entity Listing Par Value Per Share EntityListingParValuePerShare	0.01
CY2024	dei	Auditor Firm AuditorFirmId	392
CY2024	dei	Auditor Name AuditorName	Wolf & Company, P.C
CY2024	dei	Auditor Location AuditorLocation	Boston, Massachusetts
CY2024Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	1339000
CY2023Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	1486000
CY2024Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	25620000
CY2023Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	5375000
CY2024Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	26959000
CY2023Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6861000
CY2024Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	113000
CY2023Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	146000
CY2024Q2	cfsb	Securities Held To Maturity At Amortized Cost In Allowance For Credit Loss Fair Value SecuritiesHeldToMaturityAtAmortizedCostInAllowanceForCreditLossFairValue	149000000
CY2023Q2	cfsb	Securities Held To Maturity At Amortized Cost In Allowance For Credit Loss Fair Value SecuritiesHeldToMaturityAtAmortizedCostInAllowanceForCreditLossFairValue	149000000
CY2024Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	133420000
CY2023Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	132273000
CY2024Q2	us-gaap	Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss	146994000
CY2023Q2	us-gaap	Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss	147902000
CY2024Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	704000
CY2023Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	381000
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	1553000
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	1747000
CY2024Q2	cfsb	Loans And Leases Receivable Net Amount Reported LoansAndLeasesReceivableNetAmountReported	170438000
CY2023Q2	cfsb	Loans And Leases Receivable Net Amount Reported LoansAndLeasesReceivableNetAmountReported	175911000
CY2024Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3246000
CY2023Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3413000
CY2024Q2	us-gaap	Interest Receivable InterestReceivable	1398000
CY2023Q2	us-gaap	Interest Receivable InterestReceivable	1363000
CY2024Q2	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	10670000
CY2023Q2	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	10402000
CY2024Q2	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	1245000
CY2023Q2	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	1079000
CY2024Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	860000
CY2023Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	953000
CY2024Q2	us-gaap	Other Assets OtherAssets	812000
CY2023Q2	us-gaap	Other Assets OtherAssets	596000
CY2024Q2	us-gaap	Assets Assets	363439000
CY2023Q2	us-gaap	Assets Assets	349007000
CY2024Q2	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	34124000
CY2023Q2	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	32760000
CY2024Q2	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	236717000
CY2023Q2	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	230616000
CY2024Q2	us-gaap	Deposits Deposits	270841000
CY2023Q2	us-gaap	Deposits Deposits	263376000
CY2024Q2	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	10350000
CY2023Q2	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	3675000
CY2024Q2	cfsb	Mortgagors Escrow Accounts MortgagorsEscrowAccounts	1525000
CY2023Q2	cfsb	Mortgagors Escrow Accounts MortgagorsEscrowAccounts	1596000
CY2024Q2	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	877000
CY2023Q2	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	962000
CY2024Q2	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	3796000
CY2023Q2	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	3509000
CY2024Q2	us-gaap	Liabilities Liabilities	287389000
CY2023Q2	us-gaap	Liabilities Liabilities	273118000
CY2024Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2023Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2024Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000
CY2023Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000
CY2024Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2024Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2023Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2023Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2024Q2	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2023Q2	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2024Q2	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
CY2024Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000
CY2023Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000
CY2024Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	6621152
CY2024Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	6621152
CY2023Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	6632642
CY2023Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	6632642
CY2024Q2	us-gaap	Common Stock Value CommonStockValue	65000
CY2023Q2	us-gaap	Common Stock Value CommonStockValue	65000
CY2024Q2	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	28139000
CY2023Q2	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	27814000
CY2024Q2	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	11490
CY2024Q2	us-gaap	Treasury Stock Value TreasuryStockValue	78000
CY2023Q2	us-gaap	Treasury Stock Value TreasuryStockValue	0
CY2024Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	50226000
CY2023Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	50416000
CY2024Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1000
CY2023Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3000
CY2024Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	230084
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	240310
CY2024Q2	cfsb	Earned Unearned Compensation For Esop EarnedUnearnedCompensationForEsop	2301000
CY2023Q2	cfsb	Earned Unearned Compensation For Esop EarnedUnearnedCompensationForEsop	2403000
CY2024Q2	us-gaap	Stockholders Equity StockholdersEquity	76050000
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	75889000
CY2024Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	363439000
CY2023Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	349007000
CY2024	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	7020000
CY2023	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	6695000
CY2024	cfsb	Interest And Dividend Income Securities Operating Taxable InterestAndDividendIncomeSecuritiesOperatingTaxable	3736000
CY2023	cfsb	Interest And Dividend Income Securities Operating Taxable InterestAndDividendIncomeSecuritiesOperatingTaxable	3228000
CY2024	cfsb	Interest And Dividend Income Securities Operating Tax Exempt InterestAndDividendIncomeSecuritiesOperatingTaxExempt	363000
CY2023	cfsb	Interest And Dividend Income Securities Operating Tax Exempt InterestAndDividendIncomeSecuritiesOperatingTaxExempt	414000
CY2024	us-gaap	Interest Income And Fees Bankers Acceptances Certificates Of Deposit And Commercial Paper InterestIncomeAndFeesBankersAcceptancesCertificatesOfDepositAndCommercialPaper	552000
CY2023	us-gaap	Interest Income And Fees Bankers Acceptances Certificates Of Deposit And Commercial Paper InterestIncomeAndFeesBankersAcceptancesCertificatesOfDepositAndCommercialPaper	341000
CY2024	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	11671000
CY2023	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10678000
CY2024	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4513000
CY2023	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1872000
CY2024	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	453000
CY2023	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	54000
CY2024	us-gaap	Interest Expense Operating InterestExpenseOperating	4966000
CY2023	us-gaap	Interest Expense Operating InterestExpenseOperating	1926000
CY2024	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	6705000
CY2023	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8752000
CY2024	cfsb	Allowance For Credit Losses Expensed Reversed Related To Loans AllowanceForCreditLossesExpensedReversedRelatedToLoans	-203000
CY2023	cfsb	Allowance For Credit Losses Expensed Reversed Related To Loans AllowanceForCreditLossesExpensedReversedRelatedToLoans	0
CY2024	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	8000
CY2023	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	0
CY2024	cfsb	Securities Held To Maturity1 SecuritiesHeldToMaturity1	-127000
CY2023	cfsb	Securities Held To Maturity1 SecuritiesHeldToMaturity1	0
CY2024	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	-322000
CY2023	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	0
CY2024	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7027000
CY2023	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8752000
CY2024	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	155000
CY2023	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	146000
CY2024	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	268000
CY2023	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	258000
CY2024	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	242000
CY2023	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	260000
CY2024	us-gaap	Noninterest Income NoninterestIncome	665000
CY2023	us-gaap	Noninterest Income NoninterestIncome	664000
CY2024	us-gaap	Labor And Related Expense LaborAndRelatedExpense	4558000
CY2023	us-gaap	Labor And Related Expense LaborAndRelatedExpense	4517000
CY2024	us-gaap	Occupancy Net OccupancyNet	975000
CY2023	us-gaap	Occupancy Net OccupancyNet	1028000
CY2024	us-gaap	Advertising Expense AdvertisingExpense	140000
CY2023	us-gaap	Advertising Expense AdvertisingExpense	185000
CY2024	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	369000
CY2023	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	344000
CY2024	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	133000
CY2023	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	106000
CY2024	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	1523000
CY2023	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	1489000
CY2024	us-gaap	Noninterest Expense NoninterestExpense	7698000
CY2023	us-gaap	Noninterest Expense NoninterestExpense	7669000
CY2024	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-6000
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1747000
CY2024	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-39000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	301000
CY2024	us-gaap	Net Income Loss NetIncomeLoss	33000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	1446000
CY2024	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.01
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
CY2024	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.01
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
CY2024	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6291529
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6275819
CY2024	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6291529
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6275874
CY2024	us-gaap	Net Income Loss NetIncomeLoss	33000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	1446000
CY2024	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	4000
CY2023	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-5000
CY2024	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	4000
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-5000
CY2024	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	2000
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-2000
CY2024	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	2000
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-3000
CY2024	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	35000
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1443000
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	75889000
CY2024	cfsb	Cumulative Effect Accounting Adjustment CumulativeEffectAccountingAdjustment	-223000
CY2024	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	33000
CY2024	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	2000
CY2024	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	358000
CY2024	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	78000
CY2024	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	69000
CY2024Q2	us-gaap	Stockholders Equity StockholdersEquity	76050000
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	74250000
CY2023	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	1446000
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-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
CY2024Q2	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	9000
CY2024Q2	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	198000
CY2024Q2	cfsb	Off Balance Sheet Credit Loss Liability Net Of Tax OffBalanceSheetCreditLossLiabilityNetOfTax	16000
CY2024	us-gaap	Net Income Loss NetIncomeLoss	33000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	1446000
CY2024	cfsb	Adjustments For Provision For Loan Losses AdjustmentsForProvisionForLoanLosses	-322000
CY2023	cfsb	Adjustments For Provision For Loan Losses AdjustmentsForProvisionForLoanLosses	0
CY2024	us-gaap	Adjustment For Amortization AdjustmentForAmortization	327000
CY2023	us-gaap	Adjustment For Amortization AdjustmentForAmortization	437000
CY2024	cfsb	Net Change In Deferred Loan Costs And Fees NetChangeInDeferredLoanCostsAndFees	36000
CY2023	cfsb	Net Change In Deferred Loan Costs And Fees NetChangeInDeferredLoanCostsAndFees	2000
CY2024	cfsb	Increase Decrease In Bank Owned Life Insurance IncreaseDecreaseInBankOwnedLifeInsurance	268000
CY2023	cfsb	Increase Decrease In Bank Owned Life Insurance IncreaseDecreaseInBankOwnedLifeInsurance	258000
CY2024	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-80000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2000
CY2024	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	238000
CY2023	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	235000
CY2024	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	69000
CY2023	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	87000
CY2024	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	358000
CY2023	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	109000
CY2024	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	35000
CY2023	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	98000
CY2024	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-48000
CY2023	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-91000
CY2024	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	404000
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2053000
CY2024	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	37000
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	48000
CY2024	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	17132000
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	13668000
CY2024	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	16700000
CY2023	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	16768000
CY2024	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	323000
CY2023	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	190000
CY2024	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-5628000
CY2023	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	3320000
CY2024	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	71000
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	314000
CY2024	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	5703000
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-6876000
CY2024	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	7465000
CY2023	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-23699000
CY2024	cfsb	Treasury Stock Purchased TreasuryStockPurchased	-78000
CY2023	cfsb	Treasury Stock Purchased TreasuryStockPurchased	0
CY2024	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-3675000
CY2023	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	3675000
CY2024	us-gaap	Proceeds From Repayments Of Long Term Debt And Capital Securities ProceedsFromRepaymentsOfLongTermDebtAndCapitalSecurities	10350000
CY2023	us-gaap	Proceeds From Repayments Of Long Term Debt And Capital Securities ProceedsFromRepaymentsOfLongTermDebtAndCapitalSecurities	0
CY2024	cfsb	Increase Decrease In Mortgagors Escrow Accounts IncreaseDecreaseInMortgagorsEscrowAccounts	-71000
CY2023	cfsb	Increase Decrease In Mortgagors Escrow Accounts IncreaseDecreaseInMortgagorsEscrowAccounts	41000
CY2024	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	13991000
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-19983000
CY2024	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	20098000
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-24806000
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
CY2024Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	26959000
CY2023Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6861000
CY2024	us-gaap	Interest Paid Net InterestPaidNet	4898000
CY2023	us-gaap	Interest Paid Net InterestPaidNet	1926000
CY2024	us-gaap	Income Taxes Paid IncomeTaxesPaid	85000
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	540000
CY2024	cfsb	Adoption Of Asu201602 AdoptionOfAsu201602	0
CY2023	cfsb	Adoption Of Asu201602 AdoptionOfAsu201602	1044000
CY2024	cfsb	Adoption Of Asu201613 AdoptionOfAsu201613	223000
CY2023	cfsb	Adoption Of Asu201613 AdoptionOfAsu201613	0
CY2024Q2	cfsb	Number Common Stock Shares Sold NumberCommonStockSharesSold	2804306
CY2024Q2	cfsb	Stated Value Per Share For Stock Sold To The Public StatedValuePerShareForStockSoldToThePublic	10
CY2024	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0
CY2023	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	272945
CY2024	us-gaap	Use Of Estimates UseOfEstimates	<p style="text-indent:5%;font-size:10pt;margin-top:12pt;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;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-size:10pt;font-family:Times New Roman;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 credit losses.</span></p>
CY2024	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;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-size:10pt;font-family:Times New Roman;min-width:fit-content;">Certain amounts in the 2023 consolidated financial statements have been reclassified to conform to the 2024</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> presentation.</span></p>
CY2024Q2	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.80
CY2024Q2	cfsb	Interest Penalties InterestPenalties	0
CY2023Q2	cfsb	Interest Penalties InterestPenalties	0
CY2024	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1000
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3000
CY2020Q1	cfsb	Federal Reserve Requirement Ratio FederalReserveRequirementRatio	0
CY2024Q2	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	0
CY2023Q2	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	0
CY2024Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	114000
CY2024Q2	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0
CY2024Q2	cfsb	Available For Sale Securities Net Carrying Amount AvailableForSaleSecuritiesNetCarryingAmount	114000
CY2024Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0
CY2024Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1000
CY2024Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	113000
CY2024Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	147143000
CY2024Q2	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	149000
CY2024Q2	cfsb	Securities Held To Maturity Net Carrying Amount SecuritiesHeldToMaturityNetCarryingAmount	146994000
CY2024Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	36000
CY2024Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	13610000
CY2024Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	133420000
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	Held To Maturity Securities HeldToMaturitySecurities	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
CY2024Q2	cfsb	Securityownedandpledgedascollateralamortizedcost Securityownedandpledgedascollateralamortizedcost	32810000
CY2024Q2	us-gaap	Security Owned And Pledged As Collateral Associated Liabilities Fair Value SecurityOwnedAndPledgedAsCollateralAssociatedLiabilitiesFairValue	28478000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	1000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	1000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	8000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	8000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	93000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	92000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	12000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	12000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	114000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	113000
CY2024Q2	us-gaap	Heldtomaturity Securities Debt Maturities Next Rolling Twelve Months Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost	5565000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities Next Rolling Twelve Months Fair Value HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	5508000
CY2024Q2	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Two Through Five Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost	49500000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Two Through Five Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	46370000
CY2024Q2	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost	47088000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Six Through Ten Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	42472000
CY2024Q2	us-gaap	Heldtomaturity Securities Debt Maturities Rolling After Ten Years Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost	44990000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities Rolling After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue	39070000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Amortized Cost Basis HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	147143000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	133420000
CY2024	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	0
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	0
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	0
CY2024Q2	cfsb	Depreciation From Amortized Cost Basis Less Than Twelve Months DepreciationFromAmortizedCostBasisLessThanTwelveMonths	0
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	31
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1000
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	74000
CY2024Q2	cfsb	Depreciation From Amortized Cost Basis Over Twelve Months DepreciationFromAmortizedCostBasisOverTwelveMonths	0.013
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	20
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	cfsb	Depreciation From Amortized Cost Basis Less Than Twelve Months DepreciationFromAmortizedCostBasisLessThanTwelveMonths	0.027
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	20
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	Depreciation From Amortized Cost Basis Over Twelve Months DepreciationFromAmortizedCostBasisOverTwelveMonths	0.043
CY2024Q2	cfsb	Debtsecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositions Debtsecuritiesinunrealizedlosspositionsqualitativedisclosurenumberofpositions	249
CY2024	cfsb	Debtsecuritiesinunrealizedlosspositionspercentageofdepreciationapplicable Debtsecuritiesinunrealizedlosspositionspercentageofdepreciationapplicable	0.1015
CY2024	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2024Q2	cfsb	Loans And Leases Receivables Gross Carrying Amount LoansAndLeasesReceivablesGrossCarryingAmount	172378000
CY2023Q2	cfsb	Loans And Leases Receivables Gross Carrying Amount LoansAndLeasesReceivablesGrossCarryingAmount	178009000
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	1553000
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	1747000
CY2024Q2	cfsb	Loans And Leases Receivable Deferred Loan Fees LoansAndLeasesReceivableDeferredLoanFees	387000
CY2023Q2	cfsb	Loans And Leases Receivable Deferred Loan Fees LoansAndLeasesReceivableDeferredLoanFees	351000
CY2024Q2	cfsb	Loans And Leases Receivable Net Amount Reported LoansAndLeasesReceivableNetAmountReported	170438000
CY2023Q2	cfsb	Loans And Leases Receivable Net Amount Reported LoansAndLeasesReceivableNetAmountReported	175911000
CY2024	us-gaap	Loans And Leases Receivable Related Parties Period Increase Decrease LoansAndLeasesReceivableRelatedPartiesPeriodIncreaseDecrease	2000000
CY2023	us-gaap	Loans And Leases Receivable Related Parties Period Increase Decrease LoansAndLeasesReceivableRelatedPartiesPeriodIncreaseDecrease	2100000
CY2023Q2	cfsb	Related Party Loan Outstanding RelatedPartyLoanOutstanding	2078000
CY2022Q2	cfsb	Related Party Loan Outstanding RelatedPartyLoanOutstanding	3047000
CY2024	cfsb	Related Parties New Loans RelatedPartiesNewLoans	0
CY2023	cfsb	Related Parties New Loans RelatedPartiesNewLoans	0
CY2024	cfsb	Draws Draws	0
CY2023	cfsb	Draws Draws	3000
CY2024	us-gaap	Payments To Fund Longterm Loans To Related Parties PaymentsToFundLongtermLoansToRelatedParties	0
CY2023	us-gaap	Payments To Fund Longterm Loans To Related Parties PaymentsToFundLongtermLoansToRelatedParties	482000
CY2024	us-gaap	Proceeds From Repayments Of Related Party Debt ProceedsFromRepaymentsOfRelatedPartyDebt	-100000
CY2023	us-gaap	Proceeds From Repayments Of Related Party Debt ProceedsFromRepaymentsOfRelatedPartyDebt	-490000
CY2024Q2	cfsb	Related Party Loan Outstanding RelatedPartyLoanOutstanding	1978000
CY2023Q2	cfsb	Related Party Loan Outstanding RelatedPartyLoanOutstanding	2078000
CY2023Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	223000
CY2023Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	88000
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	1747000
CY2023	cfsb	Provision For Credit Losses ProvisionForCreditLosses	0
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	0
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	0
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	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	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	1747000
CY2023Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	0
CY2023Q2	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	178009000
CY2023Q2	cfsb	Financing Receivable Gross Carrying Amount FinancingReceivableGrossCarryingAmount	178009000
CY2024	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	0
CY2023	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
CY2024	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	0
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	0
CY2024Q2	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	12774000
CY2024Q2	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	20614000
CY2024Q2	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	34347000
CY2024Q2	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	20622000
CY2024Q2	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	20089000
CY2024Q2	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	62341000
CY2024Q2	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	1591000
CY2024Q2	cfsb	Loans And Leases Receivables Gross Carrying Amount LoansAndLeasesReceivablesGrossCarryingAmount	172378000
CY2023Q2	cfsb	Loans And Leases Receivables Gross Carrying Amount LoansAndLeasesReceivablesGrossCarryingAmount	178009000
CY2024Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	5151000
CY2023Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	5116000
CY2024Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1905000
CY2023Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1703000
CY2024Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3246000
CY2023Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3413000
CY2024	us-gaap	Depreciation And Amortization DepreciationAndAmortization	238000
CY2023	us-gaap	Depreciation And Amortization DepreciationAndAmortization	235000
CY2024Q2	cfsb	Deposits Negotiable Order Of Withdrawal Now And Demand Deposit Accounts DepositsNegotiableOrderOfWithdrawalNowAndDemandDepositAccounts	62386000
CY2023Q2	cfsb	Deposits Negotiable Order Of Withdrawal Now And Demand Deposit Accounts DepositsNegotiableOrderOfWithdrawalNowAndDemandDepositAccounts	61538000
CY2024Q2	cfsb	Regular And Other Deposits RegularAndOtherDeposits	54192000
CY2023Q2	cfsb	Regular And Other Deposits RegularAndOtherDeposits	64184000
CY2024Q2	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	21956000
CY2023Q2	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	26995000
CY2024Q2	cfsb	Non Certificate Deposits NonCertificateDeposits	138534000
CY2023Q2	cfsb	Non Certificate Deposits NonCertificateDeposits	152717000
CY2024Q2	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	26113000
CY2023Q2	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	24340000
CY2024Q2	cfsb	Time Deposits Less Than Fdic Insurance Limit TimeDepositsLessThanFdicInsuranceLimit	106194000
CY2023Q2	cfsb	Time Deposits Less Than Fdic Insurance Limit TimeDepositsLessThanFdicInsuranceLimit	86319000
CY2024Q2	us-gaap	Time Deposits TimeDeposits	132307000
CY2023Q2	us-gaap	Time Deposits TimeDeposits	110659000
CY2024Q2	us-gaap	Deposits Deposits	270841000
CY2023Q2	us-gaap	Deposits Deposits	263376000
CY2024Q2	cfsb	Time Deposit Maturities Within Three Months TimeDepositMaturitiesWithinThreeMonths	47453000
CY2024Q2	cfsb	Time Deposits Weighted Average Interest Rate Maturities Within Three Months1 TimeDepositsWeightedAverageInterestRateMaturitiesWithinThreeMonths1	0.0484
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
CY2024Q2	cfsb	Time Deposit Maturities Over Three Months To One Year TimeDepositMaturitiesOverThreeMonthsToOneYear	74112000
CY2024Q2	cfsb	Time Deposits Weighted Average Interest Rate Maturities Over Three Months To One Year1 TimeDepositsWeightedAverageInterestRateMaturitiesOverThreeMonthsToOneYear1	0.0417
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
CY2024Q2	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	8200000
CY2024Q2	us-gaap	Time Deposits Weighted Average Interest Rate Maturities Year Two TimeDepositsWeightedAverageInterestRateMaturitiesYearTwo	0.0243
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
CY2024Q2	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	2231000
CY2024Q2	us-gaap	Time Deposits Weighted Average Interest Rate Maturities Year Three TimeDepositsWeightedAverageInterestRateMaturitiesYearThree	0.0244
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
CY2024Q2	cfsb	Time Deposit Maturities Year Four And Five TimeDepositMaturitiesYearFourAndFive	311000
CY2024Q2	cfsb	Time Deposits Weighted Average Interest Rate Maturities Year Four And Five TimeDepositsWeightedAverageInterestRateMaturitiesYearFourAndFive	0.0065
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
CY2024Q2	us-gaap	Time Deposits TimeDeposits	132307000
CY2024Q2	cfsb	Time Deposits Weighted Average Interest Rate TimeDepositsWeightedAverageInterestRate	0.0427
CY2023Q2	us-gaap	Time Deposits TimeDeposits	110659000
CY2023Q2	cfsb	Time Deposits Weighted Average Interest Rate TimeDepositsWeightedAverageInterestRate	0.0286
CY2024	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Interest Rate For Year FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear	0.0451
CY2023Q2	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	3700000
CY2023Q2	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate FederalHomeLoanBankAdvancesWeightedAverageInterestRate	0.0525
CY2024	us-gaap	Assets Under Management Average Balance AssetsUnderManagementAverageBalance	9091000
CY2023	us-gaap	Assets Under Management Average Balance AssetsUnderManagementAverageBalance	1037000
CY2024	us-gaap	Line Of Credit Facility Maximum Monthend Outstanding Amount LineOfCreditFacilityMaximumMonthendOutstandingAmount	19100000
CY2023	us-gaap	Line Of Credit Facility Maximum Monthend Outstanding Amount LineOfCreditFacilityMaximumMonthendOutstandingAmount	5300000
CY2024	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 one- to four-family residential property.
CY2024Q2	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	0
CY2023Q2	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	0
CY2024	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	4000
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	268000
CY2024	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	37000
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	31000
CY2024	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	41000
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	299000
CY2024	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-134000
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-62000
CY2024	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	87000
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0
CY2024	cfsb	Deferred Tax Expense Valuation Allowance DeferredTaxExpenseValuationAllowance	-33000
CY2023	cfsb	Deferred Tax Expense Valuation Allowance DeferredTaxExpenseValuationAllowance	64000
CY2024	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-80000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2000
CY2024	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-39000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	301000
CY2024	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-1000
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	367000
CY2024	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	16000
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	22000
CY2024	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	42000
CY2023	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	85000
CY2024	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	73000
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	31000
CY2024	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	21000
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	7000
CY2024	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-47000
CY2023	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-43000
CY2024	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	87000
CY2023	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	64000
CY2024	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-39000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	301000
CY2024	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-6.50
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.172
CY2024Q2	cfsb	Deferred Tax Assets Allowance For Loan Losses DeferredTaxAssetsAllowanceForLoanLosses	463000
CY2023Q2	cfsb	Deferred Tax Assets Allowance For Loan Losses DeferredTaxAssetsAllowanceForLoanLosses	466000
CY2024Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	469000
CY2023Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	360000
CY2024Q2	cfsb	Deferred Tax Assets Esop DeferredTaxAssetsEsop	32000
CY2023Q2	cfsb	Deferred Tax Assets Esop DeferredTaxAssetsEsop	23000
CY2024Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	38000
CY2023Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	22000
CY2024Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	5000
CY2023Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	1000
CY2024Q2	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	0
CY2023Q2	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	2000
CY2024Q2	cfsb	Deferred Tax Assets Depreciation And Amortization DeferredTaxAssetsDepreciationAndAmortization	0
CY2023Q2	cfsb	Deferred Tax Assets Depreciation And Amortization DeferredTaxAssetsDepreciationAndAmortization	10000
CY2024Q2	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	104000
CY2023Q2	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	0
CY2024Q2	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	374000
CY2023Q2	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	374000
CY2024Q2	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1485000
CY2023Q2	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1258000
CY2024Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	266000
CY2023Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	179000
CY2024Q2	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1219000
CY2023Q2	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1079000
CY2024Q2	cfsb	Deferred Tax Liabilities Depreciation And Amortization DeferredTaxLiabilitiesDepreciationAndAmortization	-26000
CY2023Q2	cfsb	Deferred Tax Liabilities Depreciation And Amortization DeferredTaxLiabilitiesDepreciationAndAmortization	0
CY2024Q2	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	26000
CY2023Q2	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	0
CY2024Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1245000
CY2023Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1079000
CY2023Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1079000
CY2022Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1079000
CY2024	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-80000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2000
CY2024	cfsb	Adoption Of Asu201613 Cecl AdoptionOfAsu201613Cecl	88000
CY2024	cfsb	Deferred Tax Effects Of Net Unrealized Gain On Available For Sale Securities DeferredTaxEffectsOfNetUnrealizedGainOnAvailableForSaleSecurities	-2000
CY2023	cfsb	Deferred Tax Effects Of Net Unrealized Gain On Available For Sale Securities DeferredTaxEffectsOfNetUnrealizedGainOnAvailableForSaleSecurities	2000
CY2024Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1245000
CY2023Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1079000
CY2024Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	266000
CY2023Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	179000
CY2024	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	87000
CY2023	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	64000
CY2024Q2	cfsb	Federal Income Tax Reserve For Loan Losses FederalIncomeTaxReserveForLoanLosses	2582000
CY2024Q2	cfsb	Income Tax Reserve Used Percentage IncomeTaxReserveUsedPercentage	1.50
CY2024	cfsb	Deferred Income Tax Liability Not Recognized DeferredIncomeTaxLiabilityNotRecognized	726000
CY2024	us-gaap	Income Tax Examination Year Under Examination IncomeTaxExaminationYearUnderExamination	2020
CY2024Q2	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Not Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration	493000
CY2024Q2	us-gaap	Banking Regulation Capital Conservation Buffer Capital Conserved Minimum BankingRegulationCapitalConservationBufferCapitalConservedMinimum	0.25
CY2024Q2	us-gaap	Capital Capital	65532000
CY2024Q2	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.338
CY2024Q2	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	15501000
CY2024Q2	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.08
CY2024Q2	us-gaap	Capital Required To Be Well Capitalized CapitalRequiredToBeWellCapitalized	19377000
CY2024Q2	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.10
CY2024Q2	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	63799000
CY2024Q2	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.329
CY2024Q2	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	8719000
CY2024Q2	us-gaap	Banking Regulation Common Equity Tier One Risk Based Capital Ratio Capital Adequacy Minimum BankingRegulationCommonEquityTierOneRiskBasedCapitalRatioCapitalAdequacyMinimum	0.045
CY2024Q2	us-gaap	Common Equity Tier One Capital Required To Be Well Capitalized CommonEquityTierOneCapitalRequiredToBeWellCapitalized	12595000
CY2024Q2	us-gaap	Banking Regulation Common Equity Tier One Risk Based Capital Ratio Well Capitalized Minimum BankingRegulationCommonEquityTierOneRiskBasedCapitalRatioWellCapitalizedMinimum	0.065
CY2024Q2	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	63799000
CY2024Q2	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.329
CY2024Q2	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	11626000
CY2024Q2	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.06
CY2024Q2	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	15501000
CY2024Q2	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.08
CY2024Q2	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	63799000
CY2024Q2	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.178
CY2024Q2	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	14317000
CY2024Q2	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.04
CY2024Q2	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized TierOneLeverageCapitalRequiredToBeWellCapitalized	17896000
CY2024Q2	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	0.05
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
CY2024	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.
CY2024Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	860000
CY2023Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	953000
CY2024Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y10M17D
CY2023Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y10M17D
CY2024Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0356
CY2023Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0356
CY2024Q2	cfsb	Operating Leases Future Minimum Payment Due Current OperatingLeasesFutureMinimumPaymentDueCurrent	117000
CY2024Q2	cfsb	Operating Leases Future Minimum Payment Due In Two Years OperatingLeasesFutureMinimumPaymentDueInTwoYears	117000
CY2024Q2	cfsb	Operating Leases Future Minimum Payment Due In Three Years OperatingLeasesFutureMinimumPaymentDueInThreeYears	119000
CY2024Q2	cfsb	Operating Leases Future Minimum Payment Due In Four Years OperatingLeasesFutureMinimumPaymentDueInFourYears	134000
CY2024Q2	cfsb	Operating Leases Future Minimum Payment Due In Five Years OperatingLeasesFutureMinimumPaymentDueInFiveYears	134000
CY2024Q2	cfsb	Operating Leases Future Minimum Payment Due Thereafter OperatingLeasesFutureMinimumPaymentDueThereafter	387000
CY2024Q2	cfsb	Operating Leases Future Minimum Payment Due OperatingLeasesFutureMinimumPaymentDue	1008000
CY2024Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	131000
CY2024Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	877000
CY2024	cfsb	Operating Lease Rental Expense OperatingLeaseRentalExpense	139000
CY2023	cfsb	Operating Lease Rental Expense OperatingLeaseRentalExpense	136000
CY2023	us-gaap	Proceeds From Lease Payments ProceedsFromLeasePayments	117000
CY2024	us-gaap	Proceeds From Lease Payments ProceedsFromLeasePayments	117000
CY2024Q2	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	255648
CY2024	us-gaap	Debt Instrument Term DebtInstrumentTerm	P25Y
CY2024Q2	us-gaap	Employee Stock Ownership Plan Esop Debt Structure Direct Loan Amount EmployeeStockOwnershipPlanESOPDebtStructureDirectLoanAmount	2400000
CY2024	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	69000
CY2023	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	87000
CY2024Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Allocated Shares EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares	20452
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Allocated Shares EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares	10226
CY2024Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	5112
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	5112
CY2024Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	230084
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	240310
CY2024Q2	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	255648
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	255648
CY2024Q2	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	26959000
CY2024Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	113000
CY2024Q2	cfsb	Securities Held To Maturity SecuritiesHeldToMaturity	133420000
CY2024Q2	us-gaap	Investment In Federal Home Loan Bank Stock Fair Value Disclosure InvestmentInFederalHomeLoanBankStockFairValueDisclosure	704000
CY2024Q2	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	152164000
CY2024Q2	us-gaap	Interest Receivable InterestReceivable	1398000
CY2024Q2	us-gaap	Deposits Fair Value Disclosure DepositsFairValueDisclosure	251463000
CY2024Q2	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	10282000
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
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	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodIntrinsicValue	3.17
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
CY2023Q2	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	273000
CY2023Q2	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	3.17
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2024	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2024	cfsb	Share Based Compensation Arrangement By Share Based Payment Award Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriod	0
CY2024	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares	54600
CY2024	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	3.17
CY2024Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	273000
CY2024Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	8.33
CY2024	cfsb	Sharebasedcompensationarrangementbysharebasedpaymentawardoptionsgrantedweightedaverageremainingcontractualterm1 Sharebasedcompensationarrangementbysharebasedpaymentawardoptionsgrantedweightedaverageremainingcontractualterm1	P8Y8M12D
CY2024Q2	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	218400
CY2024Q2	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	3.17
CY2024Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	54600
CY2024Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	8.33
CY2024	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P8Y8M12D
CY2024Q2	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	639000
CY2024	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y8M12D
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
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	22200
CY2024	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	8.35
CY2024Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	88800
CY2024Q2	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
CY2024Q2	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	685000
CY2024	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y8M12D
CY2024Q2	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2024Q2	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2024Q2	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2024Q2	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false

Files In Submission

Name	View Source	Status
0000950170-24-107819-index-headers.html	Edgar Link	pending
0000950170-24-107819-index.html	Edgar Link	pending
0000950170-24-107819.txt	Edgar Link	pending
0000950170-24-107819-xbrl.zip	Edgar Link	pending
cfsb-20240630.htm	Edgar Link	pending
cfsb-20240630.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
cfsb-ex97.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
img29367646_0.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
cfsb-20240630_htm.xml	Edgar Link	completed
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

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

2024 Q3 Form 10-K Financial Statement

#000095017024107819 Filed on September 18, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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

2024 Q3 Form 10-K Financial Statement

#000095017024107819 Filed on September 18, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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