$FUSB
FIRST US BANCSHARES, INC. Stock $fusb

$fusb Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000095017024031518 Filed on March 14, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$299.0K	$13.95M	$1.197M
YoY Change	4.91%	20.0%	-97.09%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development	$192.0K		$722.0K
YoY Change	13.61%		5.87%
% of Gross Profit
Depreciation & Amortization	$428.0K	$436.0K	$1.776M
YoY Change	-8.35%	-6.84%	-5.63%
% of Gross Profit
Operating Expenses	$990.0K		$5.142M
YoY Change	-18.85%		-9.38%
Operating Profit
YoY Change
Interest Expense	$5.237M	$4.835M	$15.46M
YoY Change	107.32%	179.48%	263.16%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$2.758M	$3.059M	$11.27M
YoY Change	1.25%	4.19%	25.07%
Income Tax	$651.0K	$782.0K	$2.786M
% Of Pretax Income	23.6%	25.56%	24.72%
Net Earnings	$2.107M	$2.277M	$8.485M
YoY Change	1.69%	2.2%	23.62%
Net Earnings / Revenue	704.68%	16.33%	708.86%
Basic Earnings Per Share	$0.36	$0.38	$1.42
Diluted Earnings Per Share	$0.34	$0.36	$1.33
COMMON SHARES
Basic Shares Outstanding	5.787M	5.875M	5.965M
Diluted Shares Outstanding	6.277M		6.376M

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$60.24M	$50.28M
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	$25.04M	$24.40M	$24.40M
YoY Change	3.09%	-0.17%	-0.17%
Goodwill	$7.435M	$7.435M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets			$5.342M
YoY Change			3.93%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.071B	$1.073B	$1.073B
YoY Change	4.34%	7.87%	7.87%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.714M	$2.030M	$2.030M
YoY Change	103.8%	234.43%	234.43%
Accrued Expenses	$1.980M	$2.055M	$2.055M
YoY Change	5.88%	4.79%	4.79%
Deferred Revenue
YoY Change
Short-Term Debt	$15.00M	$10.00M	$10.00M
YoY Change	-40.0%	-50.09%	-50.09%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$16.71M	$12.03M	$12.03M
YoY Change	-35.32%	1881.88%	1881.88%
LONG-TERM LIABILITIES
Long-Term Debt	$10.82M	$10.80M	$10.80M
YoY Change	0.68%	0.68%	0.68%
Other Long-Term Liabilities	$7.416M	$9.327M	$9.327M
YoY Change	-0.2%	14.64%	14.64%
Total Long-Term Liabilities	$18.23M	$20.13M	$20.13M
YoY Change	0.32%	6.7%	6.7%
TOTAL LIABILITIES
Total Short-Term Liabilities	$16.71M	$12.03M	$12.03M
Total Long-Term Liabilities	$18.23M	$20.13M	$20.13M
Total Liabilities	$978.2M	$982.3M	$982.3M
YoY Change	3.86%	8.01%	8.01%
SHAREHOLDERS EQUITY
Retained Earnings	$111.8M	$110.0M
YoY Change	7.04%	5.26%
Common Stock	$15.20M	$15.05M
YoY Change	3.11%	3.17%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$28.03M	$27.98M
YoY Change	4.99%	4.92%
Treasury Stock Shares
Shareholders Equity	$92.33M	$90.59M	$90.59M
YoY Change
Total Liabilities & Shareholders Equity	$1.071B	$1.073B	$1.073B
YoY Change	4.34%	7.87%	7.87%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$2.107M	$2.277M	$8.485M
YoY Change	1.69%	2.2%	23.62%
Depreciation, Depletion And Amortization	$428.0K	$436.0K	$1.776M
YoY Change	-8.35%	-6.84%	-5.63%
Cash From Operating Activities	$825.0K	$2.057M	$13.07M
YoY Change	-76.99%	-32.04%	4.29%
INVESTING ACTIVITIES
Capital Expenditures	$967.0K	$484.0K	$1.464M
YoY Change	595.68%	-17.97%	16.01%
Acquisitions
YoY Change
Other Investing Activities	$12.37M	-$18.86M	-$58.98M
YoY Change	431.77%	54.18%	-25.28%
Cash From Investing Activities	$11.40M	-$19.35M	-$60.45M
YoY Change	421.35%	50.86%	-24.63%
FINANCING ACTIVITIES
Cash Dividend Paid	$289.0K		$1.175M
YoY Change	-1.7%		41.23%
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-2.264M	1.436M	67.51M
YoY Change	-106.97%	-54.11%	84.55%
NET CHANGE
Cash From Operating Activities	825.0K	2.057M	13.07M
Cash From Investing Activities	11.40M	-19.35M	-60.45M
Cash From Financing Activities	-2.264M	1.436M	67.51M
Net Change In Cash	9.963M	-15.85M	20.13M
YoY Change	-73.97%	137.75%	-164.73%
FREE CASH FLOW
Cash From Operating Activities	$825.0K	$2.057M	$13.07M
Capital Expenditures	$967.0K	$484.0K	$1.464M
Free Cash Flow	-$142.0K	$1.573M	$11.60M
YoY Change	-104.12%	-35.45%	2.98%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0000717806
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023	dei	Entity Registrant Name EntityRegistrantName	FIRST US BANCSHARES, INC
CY2023	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	http://fasb.org/us-gaap/2023#ServiceMember
CY2022	us-gaap	Type Of Revenue Extensible List TypeOfRevenueExtensibleList	http://fasb.org/us-gaap/2023#ServiceMember
CY2023	us-gaap	Open Tax Year OpenTaxYear	2020 2021 2022 2023
CY2023	us-gaap	Operating Lease Income Comprehensive Income Extensible List OperatingLeaseIncomeComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2023#LeaseIncome
CY2022	us-gaap	Operating Lease Income Comprehensive Income Extensible List OperatingLeaseIncomeComprehensiveIncomeExtensibleList	http://fasb.org/us-gaap/2023#LeaseIncome
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssets
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssets
CY2023Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilities
CY2022Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilities
CY2023	dei	Document Type DocumentType	10-K
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	000-14549
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	63-0843362
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	3291 U.S. Highway 280
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Birmingham
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	AL
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	35243
CY2023	dei	City Area Code CityAreaCode	205
CY2023	dei	Local Phone Number LocalPhoneNumber	582-1200
CY2023	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2023	dei	Trading Symbol TradingSymbol	FUSB
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 Filer Category EntityFilerCategory	Non-accelerated Filer
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CY2022Q4	us-gaap	Assets Assets	994667000
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CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	169822000
CY2023Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	796600000
CY2023	dei	Entity Small Business EntitySmallBusiness	true
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	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
CY2023Q2	dei	Entity Public Float EntityPublicFloat	46290307
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	5787118
CY2023	dei	Auditor Firm AuditorFirmId	213
CY2023	dei	Auditor Name AuditorName	Carr, Riggs & Ingram, LLC
CY2023	dei	Auditor Location AuditorLocation	Atlanta, Georgia, United States
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CY2022Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	18308000
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CY2023Q4	us-gaap	Federal Funds Sold FederalFundsSold	9475000
CY2022Q4	us-gaap	Federal Funds Sold FederalFundsSold	1768000
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	135565000
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	130795000
CY2023Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1104000
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1862000
CY2023Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	1201000
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	1359000
CY2023Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	821791000
CY2022Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	773873000
CY2023Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	10507000
CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	9422000
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CY2022Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	764451000
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24398000
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CY2022Q4	us-gaap	Interest Receivable InterestReceivable	3011000
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CY2022Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	7801000
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CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
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CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	154000
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-25000
CY2023	fusb	Other Comprehensive Income Loss Reclassification Adjustment Net Gains On Cash Flow Hedge Derivatives Realized In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentNetGainsOnCashFlowHedgeDerivativesRealizedInNetIncomeNetOfTax	-462000
CY2022	fusb	Other Comprehensive Income Loss Reclassification Adjustment Net Gains On Cash Flow Hedge Derivatives Realized In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentNetGainsOnCashFlowHedgeDerivativesRealizedInNetIncomeNetOfTax	70000
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	810000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-6965000
CY2023	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	9295000
CY2022	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-101000
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	90064000
CY2022	us-gaap	Profit Loss ProfitLoss	6864000
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-8472000
CY2022	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease After Adjustments Tax Noncontrolling Interest1 OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsTaxNoncontrollingInterest1	1507000
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2022	us-gaap	Dividends Common Stock DividendsCommonStock	832000
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	485000
CY2022	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	4481000
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	85135000
CY2023	us-gaap	Profit Loss ProfitLoss	8485000
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1322000
CY2023	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease After Adjustments Tax Noncontrolling Interest1 OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsTaxNoncontrollingInterest1	-512000
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.2
CY2023	us-gaap	Dividends Common Stock DividendsCommonStock	1175000
CY2023	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	571000
CY2023	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1422000
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	90593000
CY2023	us-gaap	Profit Loss ProfitLoss	8485000
CY2022	us-gaap	Profit Loss ProfitLoss	6864000
CY2023	fusb	Depreciation And Amortization Of Property Plant And Equipment And Computer Programs DepreciationAndAmortizationOfPropertyPlantAndEquipmentAndComputerPrograms	1581000
CY2022	fusb	Depreciation And Amortization Of Property Plant And Equipment And Computer Programs DepreciationAndAmortizationOfPropertyPlantAndEquipmentAndComputerPrograms	1614000
CY2023	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	319000
CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	3308000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	133000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-367000
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-83000
CY2023	fusb	Proceeds From Settlement Of Derivative Contracts ProceedsFromSettlementOfDerivativeContracts	2166000
CY2022	fusb	Proceeds From Settlement Of Derivative Contracts ProceedsFromSettlementOfDerivativeContracts	324000
CY2023	fusb	Reclassification Of Unrealized Gains On Terminated Derivative Contracts ReclassificationOfUnrealizedGainsOnTerminatedDerivativeContracts	1160000
CY2023	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	28000
CY2022	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	195000
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	195000
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	268000
CY2023	fusb	Gains Losses On Sales Of Premises Equipment And Other Real Estate Held For Sale GainsLossesOnSalesOfPremisesEquipmentAndOtherRealEstateHeldForSale	-621000
CY2022	fusb	Gains Losses On Sales Of Premises Equipment And Other Real Estate Held For Sale GainsLossesOnSalesOfPremisesEquipmentAndOtherRealEstateHeldForSale	207000
CY2023	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	965000
CY2022	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	455000
CY2023	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1208000
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-333000
CY2023	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	1423000
CY2022	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	383000
CY2023	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	853000
CY2022	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-299000
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	13067000
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	12529000
CY2023	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	-7707000
CY2022	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	-1686000
CY2023	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	14891000
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	39255000
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	8531000
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	11856000
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	19250000
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	755000
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	1563000
CY2023	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-158000
CY2022	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	489000
CY2023	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	49650000
CY2022	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	69935000
CY2023	fusb	Proceeds From Sale Of Premises And Equipment And Other Real Estate ProceedsFromSaleOfPremisesAndEquipmentAndOtherRealEstate	497000
CY2022	fusb	Proceeds From Sale Of Premises And Equipment And Other Real Estate ProceedsFromSaleOfPremisesAndEquipmentAndOtherRealEstate	3084000
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1464000
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1262000
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-60446000
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-80199000
CY2023	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	80166000
CY2022	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	31899000
CY2023	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-10038000
CY2022	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	9992000
CY2023	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	25000
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1422000
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4481000
CY2023	us-gaap	Payments Of Dividends PaymentsOfDividends	1175000
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	832000
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	67506000
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	36578000
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	20127000
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-31092000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	30152000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	61244000
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	50279000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	30152000
CY2023	us-gaap	Nature Of Operations NatureOfOperations	<div style="display:flex;margin-top:10pt;justify-content:flex-start;align-items:baseline;margin-bottom:0;min-width:5.065%;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:5.065%;display:inline-flex;justify-content:flex-start;">1.</span><div style="width:100%;display:inline;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">DESCRIPTION OF BUSINESS</span></div></div><p style="margin-left:5%;text-indent:7.018%;font-size:10pt;margin-top:10pt;font-family:Times New Roman;margin-bottom:8pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">First US Bancshares, Inc., a Delaware corporation (“Bancshares” and, together with its subsidiary, the “Company”), is a bank holding company formed in 1983 registered under the Bank Holding Company Act of 1956, as amended (the “BHCA”). Bancshares operates one banking subsidiary, First US Bank, an Alabama banking corporation (the “Bank”). Prior to its name change on October 11, 2016, Bancshares was known as United Security Bancshares, Inc. Bancshares and the Bank are headquartered in Birmingham, Alabama.</span></p><p style="margin-left:5%;text-indent:7.018%;font-size:10pt;margin-top:10pt;font-family:Times New Roman;margin-bottom:8pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">The Bank conducts a general commercial banking business and offers banking services such as demand, savings, individual retirement account and time deposits, personal and commercial loans, safe deposit box services and remote deposit capture. The Bank operates and serves its customers through 15 full-service banking offices located in Birmingham, Butler, Calera, Centreville, Gilbertown, Grove Hill, Harpersville, Jackson, Thomasville, Tuscaloosa and Woodstock, Alabama; Knoxville and Powell, Tennessee; and Rose Hill, Virginia; as well as loan production offices in Mobile, Alabama and the Chattanooga, Tennessee area. The Bank provides a wide range of commercial banking services to small- and medium-sized businesses, property managers, business executives, professionals and other individuals. The Bank also performs indirect lending through third-party retailers and currently conducts this lending in </span><span style="font-size:10pt;font-family:Times New Roman;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">17</span></span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> states, including Alabama, Arkansas, Florida, Georgia, Indiana, Iowa, Kansas, Kentucky, Mississippi, Missouri, Nebraska, North Carolina, Oklahoma, South Carolina, Tennessee, Texas and Virginia.</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span></p><p style="margin-left:5%;text-indent:7.018%;font-size:10pt;margin-top:10pt;font-family:Times New Roman;margin-bottom:8pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Previously, the Bank had two wholly owned subsidiaries: Acceptance Loan Company, Inc., an Alabama corporation (“ALC”), and FUSB Reinsurance, Inc., an Arizona corporation (“FUSB Reinsurance”). Both ALC and FUSB Reinsurance were dissolved in 2023, after all remaining assets and liabilities of these entities were transferred to the Bank. As used herein, unless the context suggests otherwise, references to the “Company,” “we,” “us” and “our” refer to Bancshares and the Bank, as well as ALC and FUSB Reinsurance (for periods prior to their dissolution), collectively.</span></p><p style="margin-left:5%;text-indent:7.018%;font-size:10pt;margin-top:10pt;font-family:Times New Roman;margin-bottom:8pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">ALC was a finance company headquartered in Mobile, Alabama. The Bank will continue to manage the remaining loans from ALC’s portfolio, which totaled $</span><span style="font-size:10pt;font-family:Times New Roman;color:#000000;white-space:pre-wrap;min-width:fit-content;">10.5</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> million as of December 31, 2023, through final resolution. FUSB Reinsurance was designed to reinsure certain insurance policies sold to the Bank's and ALC's consumer loan customers.</span></p>
CY2023	fusb	Number Of States NumberOfStates	17
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<p style="margin-left:5.067%;font-size:10pt;margin-top:10pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Use of Estimates</span></p><p style="margin-left:5%;font-size:10pt;margin-top:10pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">The accounting principles and reporting policies of the Company, and the methods of applying these principles, conform with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and with general practices within the financial services industry. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the consolidated balance sheets, and revenues and expenses for the period included in the consolidated statements of operations and of cash flows. Actual results could differ from those estimates.</span></p><p style="margin-left:5%;font-size:10pt;margin-top:10pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Material estimates that are particularly susceptible to significant changes in the near term relate to the accounting for the allowance for credit losses, the right-of-use asset and lease liability, the value of other real estate owned (“OREO”) and certain collateral-dependent loans, consideration related to goodwill impairment testing and deferred tax asset valuation. In connection with the determination of the allowance for credit losses and OREO, management generally obtains independent appraisals for significant properties, evaluates the overall portfolio characteristics and delinquencies and monitors economic conditions.</span></p>
CY2023	fusb	Maximum Maturity Period For Cash Equivalents MaximumMaturityPeriodForCashEquivalents	P90D
CY2023	us-gaap	Interest Paid Net InterestPaidNet	14033000
CY2022	us-gaap	Interest Paid Net InterestPaidNet	3873000
CY2023	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2375000
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2855000
CY2023	us-gaap	Mortgage Loans On Real Estate Foreclosures MortgageLoansOnRealEstateForeclosures	1178000
CY2022	us-gaap	Mortgage Loans On Real Estate Foreclosures MortgageLoansOnRealEstateForeclosures	907000
CY2022	fusb	Closed Branch Assets Transferred To Other Real Estate ClosedBranchAssetsTransferredToOtherRealEstate	391000
CY2023	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	134000
CY2022	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	138000
CY2023	fusb	Number Of Investment Portfolios NumberOfInvestmentPortfolios	3
CY2023	fusb	Number Of Securities Held As Trading Securities NumberOfSecuritiesHeldAsTradingSecurities	0
CY2022	fusb	Number Of Securities Held As Trading Securities NumberOfSecuritiesHeldAsTradingSecurities	0
CY2023	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<p style="margin-left:5%;font-size:10pt;margin-top:10pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Reclassification</span></p><p style="margin-left:5%;font-size:10pt;margin-top:10pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Certain amounts presented in the prior period consolidated financial statements and related notes have been reclassified to conform to the 2023 presentation. These reclassifications had no effect on the Company’s net income, financial position or net cash flow.</span></p>
CY2023	fusb	Weighted Average Number Of Shares Outstanding WeightedAverageNumberOfSharesOutstanding	5851702
CY2022	fusb	Weighted Average Number Of Shares Outstanding WeightedAverageNumberOfSharesOutstanding	5969575
CY2023	fusb	Weighted Average Director Deferred Shares WeightedAverageDirectorDeferredShares	112857
CY2022	fusb	Weighted Average Director Deferred Shares WeightedAverageDirectorDeferredShares	114483
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5964559
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6084058
CY2023	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	411900
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	419650
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6376459
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6503708
CY2023	us-gaap	Net Income Loss NetIncomeLoss	8485000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	6864000
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.42
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.13
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.33
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.06
CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	9422000
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	144893000
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	738000
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	10066000
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	135565000
CY2023Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1104000
CY2023Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	63000
CY2023Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	1041000
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	141883000
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	8000
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	11096000
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	130795000
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1862000
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	93000
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	1769000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	12994000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	12895000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	53070000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	49767000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	249000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	241000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	58413000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	52506000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	660000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	620000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	20416000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	20397000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	195000
CY2023Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	180000
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	144893000
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	135565000
CY2023Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1104000
CY2023Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	1041000
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	1465000
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	235000
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	118105000
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	9831000
CY2023Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	1041000
CY2023Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	63000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	59240000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	2946000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	69649000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	8150000
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1413000
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	60000
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	356000
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	33000
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	108
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	3
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	38
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	86
CY2023Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	41400000
CY2022Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	54700000
CY2023Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	821791000
CY2022Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	773873000
CY2023Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	10507000
CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	9422000
CY2023Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	811284000
CY2022Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	764451000
CY2023Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	1400000
CY2022Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	200000
CY2023	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	1300000
CY2023	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	0
CY2022	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	0
CY2022	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	100000
CY2023Q4	fusb	Minimum Commitment Required For Evaluating Idividually MinimumCommitmentRequiredForEvaluatingIdividually	500000
CY2023Q4	fusb	Commitment Required For Evaluating Individually At Management Discretion CommitmentRequiredForEvaluatingIndividuallyAtManagementDiscretion	500000
CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	9422000
CY2023	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	2045000
CY2023	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	965000
CY2023	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	42000
CY2023Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	10507000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	8320000
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	3013000
CY2022	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	807000
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	3308000
CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	9422000
CY2022Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	5154000
CY2022Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	5154000
CY2022Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	367000
CY2022Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	367000
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	259000
CY2022Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	5521000
CY2022Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	5521000
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	259000
CY2023Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	821791000
CY2023Q4	fusb	Percentage Of Loans And Leases Past Due PercentageOfLoansAndLeasesPastDue	0.0037
CY2023Q4	fusb	Percentage Of Loans And Leases Current PercentageOfLoansAndLeasesCurrent	0.9963
CY2023Q4	fusb	Percentage Of Loans And Leases PercentageOfLoansAndLeases	1.0000
CY2022Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	773873000
CY2022Q4	fusb	Percentage Of Loans And Leases Past Due PercentageOfLoansAndLeasesPastDue	0.0032
CY2022Q4	fusb	Percentage Of Loans And Leases Current PercentageOfLoansAndLeasesCurrent	0.9968
CY2022Q4	fusb	Percentage Of Loans And Leases PercentageOfLoansAndLeases	1.0000
CY2023Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	2400000
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	1853000
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	1651000
CY2023	fusb	Collateral Loans Individually Evaluated Amortized Cost Basis CollateralLoansIndividuallyEvaluatedAmortizedCostBasis	2930000
CY2022	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3528000
CY2022	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	72000
CY2022	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	60000
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0
CY2022Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period Cash Flows Expected To Be Collected At Acquisition CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodCashFlowsExpectedToBeCollectedAtAcquisition	0
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	4
CY2022	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	715000
CY2022	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	646000
CY2022Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	686000
CY2021Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2149000
CY2023	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0
CY2022	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	411000
CY2023	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	15000
CY2022	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	2232000
CY2023	fusb	Other Real Estate Gross Gains OtherRealEstateGrossGains	1000
CY2022	fusb	Other Real Estate Gross Gains OtherRealEstateGrossGains	386000
CY2023	fusb	Other Real Estate Gross Losses OtherRealEstateGrossLosses	6000
CY2022	fusb	Other Real Estate Gross Losses OtherRealEstateGrossLosses	27000
CY2023	fusb	Other Real Estate Net Income Loss OtherRealEstateNetIncomeLoss	-5000
CY2022	fusb	Other Real Estate Net Income Loss OtherRealEstateNetIncomeLoss	359000
CY2023	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	64000
CY2022	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	1000
CY2023Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	602000
CY2022Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	686000
CY2023Q4	fusb	Foreclosed Real Estate Owned Fair Value Less Disposal Costs ForeclosedRealEstateOwnedFairValueLessDisposalCosts	0
CY2022Q4	fusb	Foreclosed Real Estate Owned Fair Value Less Disposal Costs ForeclosedRealEstateOwnedFairValueLessDisposalCosts	20000
CY2023Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	0
CY2022Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	0
CY2023Q4	us-gaap	Goodwill Goodwill	7400000
CY2022Q4	us-gaap	Goodwill Goodwill	7400000
CY2023Q4	us-gaap	Goodwill Goodwill	7435000
CY2022Q4	us-gaap	Goodwill Goodwill	7435000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	2048000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	2048000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1877000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1682000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	171000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	366000
CY2023Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	7606000
CY2022Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	7801000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	122000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	49000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	171000
CY2023Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	3801000
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	46412000
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	46062000
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	22014000
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	21623000
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24398000
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24439000
CY2023	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1600000
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1600000
CY2023Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	173298000
CY2023Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	129099000
CY2023Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	19610000
CY2023Q4	fusb	Time Deposit Maturities After Year Four TimeDepositMaturitiesAfterYearFour	2704000
CY2023Q4	us-gaap	Time Deposits TimeDeposits	328512000
CY2023Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	48000000
CY2022Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	29500000
CY2023Q4	fusb	Brokered Certificates Of Deposit BrokeredCertificatesOfDeposit	82700000
CY2022Q4	fusb	Brokered Certificates Of Deposit BrokeredCertificatesOfDeposit	62500000
CY2023Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	4900000
CY2022Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	4100000
CY2023Q4	us-gaap	Federal Funds Purchased FederalFundsPurchased	0
CY2022Q4	us-gaap	Federal Funds Purchased FederalFundsPurchased	0
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	0
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	38000
CY2023Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	10000000
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	20000000
CY2023Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	0
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	0
CY2023Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	61700000
CY2022Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	68200000
CY2023Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	40000000
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	50000000
CY2023Q4	fusb	Federal Home Loan Bank Advances General Debt Obligations Disclosures Excess Of Collateral Available To Utilize Additional Credit FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresExcessOfCollateralAvailableToUtilizeAdditionalCredit	21700000
CY2022Q4	fusb	Federal Home Loan Bank Advances General Debt Obligations Disclosures Excess Of Collateral Available To Utilize Additional Credit FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresExcessOfCollateralAvailableToUtilizeAdditionalCredit	18200000
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2121000
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2025000
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	70000
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-291000
CY2023	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	2191000
CY2022	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	1734000
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	532000
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	490000
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	63000
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-76000
CY2023	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	595000
CY2022	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	414000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2786000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2148000
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	2368000
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1892000
CY2023	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	55000
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	76000
CY2023	fusb	Income Tax Reconciliation Deductions Life Insurance Amount IncomeTaxReconciliationDeductionsLifeInsuranceAmount	64000
CY2022	fusb	Income Tax Reconciliation Deductions Life Insurance Amount IncomeTaxReconciliationDeductionsLifeInsuranceAmount	62000
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	406000
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	329000
CY2023	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	13000
CY2022	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-6000
CY2023	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	118000
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	71000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2786000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2148000
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	2719000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	2333000
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	817000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	895000
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	372000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	407000
CY2023Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	2332000
CY2022Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	2715000
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1000000
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	905000
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	7240000
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	7255000
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1284000
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1288000
CY2023Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	42000
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	91000
CY2023Q4	fusb	Deferred Tax Liabilities Partnerships DeferredTaxLiabilitiesPartnerships	96000
CY2022Q4	fusb	Deferred Tax Liabilities Partnerships DeferredTaxLiabilitiesPartnerships	94000
CY2023Q4	fusb	Deferred Tax Liabilities Unrealized Gains On Cash Flow Hedges DeferredTaxLiabilitiesUnrealizedGainsOnCashFlowHedges	188000
CY2022Q4	fusb	Deferred Tax Liabilities Unrealized Gains On Cash Flow Hedges DeferredTaxLiabilitiesUnrealizedGainsOnCashFlowHedges	301000
CY2023Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	288000
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	341000
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1898000
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2115000
CY2023Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	5342000
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	5140000
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2023	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	0
CY2023Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0
CY2023Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	0
CY2023	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	1
CY2022	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	1
CY2023	fusb	Defined Contribution Plan Discretionary Contribution Percent DefinedContributionPlanDiscretionaryContributionPercent	0.02
CY2023	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	400000
CY2022	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	400000
CY2023	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.20
CY2023Q4	us-gaap	Defined Benefit Plan Number Of Shares Of Equity Securities Issued By Employer And Related Parties Included In Plan Assets DefinedBenefitPlanNumberOfSharesOfEquitySecuritiesIssuedByEmployerAndRelatedPartiesIncludedInPlanAssets	170910
CY2022Q4	us-gaap	Defined Benefit Plan Number Of Shares Of Equity Securities Issued By Employer And Related Parties Included In Plan Assets DefinedBenefitPlanNumberOfSharesOfEquitySecuritiesIssuedByEmployerAndRelatedPartiesIncludedInPlanAssets	184987
CY2023Q4	us-gaap	Deferred Compensation Arrangement With Individual Common Stock Reserved For Future Issuance DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance	113042
CY2022Q4	us-gaap	Deferred Compensation Arrangement With Individual Common Stock Reserved For Future Issuance DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance	114190
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	419650
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	9.79
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	420250
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	9.79
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2023	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	500
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	8
CY2022	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	7250
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	10.82
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	600
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	10.86
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	411900
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	9.77
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	419650
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	9.79
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	411900
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	9.77
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	416249
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	9.77
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	500000
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	100000
CY2023	us-gaap	Dividends Common Stock DividendsCommonStock	1200000
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.2
CY2022	us-gaap	Dividends Common Stock DividendsCommonStock	800000
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2023	fusb	Capital Conservation Buffer Rate CapitalConservationBufferRate	0.0250
CY2023Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	98220000
CY2023Q4	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.1088
CY2023Q4	fusb	Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0700
CY2023Q4	fusb	Common Equity Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Asset CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAsset	0.0650
CY2023Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	98220000
CY2023Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1088
CY2023Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.085
CY2023Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.08
CY2023Q4	us-gaap	Capital Capital	109296000
CY2023Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1211
CY2023Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.1050
CY2023Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.1000
CY2023Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	98220000
CY2023Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0936
CY2023Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2023Q4	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	0.0500
CY2022Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	92853000
CY2022Q4	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.1107
CY2022Q4	fusb	Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0700
CY2022Q4	fusb	Common Equity Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Asset CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAsset	0.0650
CY2022Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	92853000
CY2022Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1107
CY2022Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.085
CY2022Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.08
CY2022Q4	us-gaap	Capital Capital	102275000
CY2022Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1219
CY2022Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.105
CY2022Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.1000
CY2022Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	92853000
CY2022Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0939
CY2022Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2022Q4	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	0.0500
CY2023	us-gaap	Dividend Payment Restrictions Schedule Description DividendPaymentRestrictionsScheduleDescription	Under Alabama law, a state-chartered bank must annually transfer to surplus at least 10% of its “net earnings” (defined as the remainder of all earnings from current operations plus actual recoveries on loans and investments and other assets, less all current operating expenses, actual losses, accrued dividends on preferred stock and all federal, state and local taxes) until the bank’s surplus is at least 20% of its capital. Until the bank’s surplus reaches this level, a bank may not declare a dividend in excess of 90% of its net earnings. Once a bank’s surplus equals or exceeds 20% of its capital, if the total of all dividends declared by the bank in a calendar year will exceed the sum of its net earnings for that year and its retained net earnings for the preceding two years (less any required transfers to surplus), then the bank must obtain prior written approval from the Superintendent of the Alabama State Banking Department. The bank may not pay any dividends or make any withdrawals or transfers from surplus without the prior written approval of the Superintendent. The FDIC prohibits the payment of cash dividends if (1) as a result of such payment, the bank would be undercapitalized or (2) the bank is in default with respect to any assessment due to the FDIC, including a deposit insurance assessment. These restrictions could materially influence the Bank’s, and therefore Bancshares’, ability to pay dividends.
CY2023Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2023	fusb	Lessee Operating Lease Period Of Option To Terminate LesseeOperatingLeasePeriodOfOptionToTerminate	P1Y
CY2023	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	949000
CY2022	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	864000
CY2023	us-gaap	Lease Cost LeaseCost	460000
CY2022	us-gaap	Lease Cost LeaseCost	434000
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2019000
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1883000
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	2055000
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1961000
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y4M13D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y10D
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0410
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0330
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	455000
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	427000
CY2023	us-gaap	Noninterest Income Other NoninterestIncomeOther	1235000
CY2022	us-gaap	Noninterest Income Other NoninterestIncomeOther	1433000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	395000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	295000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	302000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	308000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	269000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	930000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2499000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	444000
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	2055000
CY2023	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	471000
CY2022	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	451000
CY2023	fusb	Other Income Atm Fees OtherIncomeATMFees	415000
CY2022	fusb	Other Income Atm Fees OtherIncomeATMFees	532000
CY2022	fusb	Net Loss On Sale And Prepayment Of Investment Securities NetLossOnSaleAndPrepaymentOfInvestmentSecurities	-83000
CY2023	fusb	Gain On Sales Of Premises And Equipment And Other Assets GainOnSalesOfPremisesAndEquipmentAndOtherAssets	17000
CY2022	fusb	Gain On Sales Of Premises And Equipment And Other Assets GainOnSalesOfPremisesAndEquipmentAndOtherAssets	301000
CY2023	us-gaap	Other Income OtherIncome	332000
CY2022	us-gaap	Other Income OtherIncome	232000
CY2023	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	620000
CY2022	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	614000
CY2023	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	722000
CY2022	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	682000
CY2023	fusb	Collection And Recoveries CollectionAndRecoveries	292000
CY2022	fusb	Collection And Recoveries CollectionAndRecoveries	261000
CY2023	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	471000
CY2022	us-gaap	Noninterest Expense Directors Fees NoninterestExpenseDirectorsFees	479000
CY2023	fusb	Foreclosed Real Estate Other Expense Net Of Gain Or Loss On Sale ForeclosedRealEstateOtherExpenseNetOfGainOrLossOnSale	68000
CY2022	fusb	Foreclosed Real Estate Other Expense Net Of Gain Or Loss On Sale ForeclosedRealEstateOtherExpenseNetOfGainOrLossOnSale	-331000
CY2023	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2557000
CY2022	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2259000
CY2023	us-gaap	Operating Expenses OperatingExpenses	5142000
CY2022	us-gaap	Operating Expenses OperatingExpenses	4424000
CY2023Q4	us-gaap	Self Insurance Reserve SelfInsuranceReserve	200000
CY2022Q4	us-gaap	Self Insurance Reserve SelfInsuranceReserve	200000
CY2023Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	0
CY2023Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-434000
CY2023Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	184000
CY2023Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	300000
CY2023Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	269000
CY2022Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	527000
CY2023Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	13945000
CY2023Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	13902000
CY2023Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	12999000
CY2023Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	11960000
CY2022Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	11621000
CY2022Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10670000
CY2022Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9525000
CY2022Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9381000
CY2023Q4	us-gaap	Interest Expense InterestExpense	4835000
CY2023Q3	us-gaap	Interest Expense InterestExpense	4419000
CY2023Q2	us-gaap	Interest Expense InterestExpense	3676000
CY2023Q1	us-gaap	Interest Expense InterestExpense	2526000
CY2022Q4	us-gaap	Interest Expense InterestExpense	1730000
CY2022Q3	us-gaap	Interest Expense InterestExpense	1155000
CY2022Q2	us-gaap	Interest Expense InterestExpense	699000
CY2022Q1	us-gaap	Interest Expense InterestExpense	672000
CY2023Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9110000
CY2023Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9483000
CY2023Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9323000
CY2023Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9434000
CY2022Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9891000
CY2022Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9515000
CY2022Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8826000
CY2022Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8709000
CY2022Q4	us-gaap	Profit Loss ProfitLoss	2228000
CY2022Q3	us-gaap	Profit Loss ProfitLoss	1860000
CY2022Q2	us-gaap	Profit Loss ProfitLoss	1415000
CY2022Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1165000
CY2022Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	895000
CY2022Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	721000
CY2023Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	9544000
CY2023Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	9299000
CY2023Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	9023000
CY2023Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	9165000
CY2022Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	9364000
CY2022Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8350000
CY2022Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7931000
CY2022Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7988000
CY2023Q4	us-gaap	Noninterest Income NoninterestIncome	916000
CY2023Q3	us-gaap	Noninterest Income NoninterestIncome	837000
CY2023Q2	us-gaap	Noninterest Income NoninterestIncome	799000
CY2023Q1	us-gaap	Noninterest Income NoninterestIncome	829000
CY2022Q4	us-gaap	Noninterest Income NoninterestIncome	678000
CY2022Q3	us-gaap	Noninterest Income NoninterestIncome	1088000
CY2022Q2	us-gaap	Noninterest Income NoninterestIncome	856000
CY2022Q1	us-gaap	Noninterest Income NoninterestIncome	829000
CY2023Q4	us-gaap	Noninterest Expense NoninterestExpense	7401000
CY2023Q3	us-gaap	Noninterest Expense NoninterestExpense	7319000
CY2023Q2	us-gaap	Noninterest Expense NoninterestExpense	7151000
CY2023Q1	us-gaap	Noninterest Expense NoninterestExpense	7270000
CY2022Q4	us-gaap	Noninterest Expense NoninterestExpense	7106000
CY2022Q3	us-gaap	Noninterest Expense NoninterestExpense	7032000
CY2022Q2	us-gaap	Noninterest Expense NoninterestExpense	6878000
CY2022Q1	us-gaap	Noninterest Expense NoninterestExpense	7056000
CY2023Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3059000
CY2023Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2817000
CY2023Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2671000
CY2023Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2724000
CY2022Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2936000
CY2022Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2406000
CY2022Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1909000
CY2022Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1761000
CY2023Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	782000
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	704000
CY2023Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	648000
CY2023Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	652000
CY2022Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	708000
CY2022Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	546000
CY2022Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	494000
CY2022Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	400000
CY2023Q4	us-gaap	Profit Loss ProfitLoss	2277000
CY2023Q3	us-gaap	Profit Loss ProfitLoss	2113000
CY2023Q2	us-gaap	Profit Loss ProfitLoss	2023000
CY2023Q1	us-gaap	Profit Loss ProfitLoss	2072000
CY2022Q1	us-gaap	Profit Loss ProfitLoss	1361000
CY2023Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.38
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.35
CY2023Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.35
CY2022Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.37
CY2022Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.31
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
CY2022Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2023Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.36
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2023Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2022Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.35
CY2022Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2022Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
CY2022Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2023Q4	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false

Files In Submission

Name	View Source	Status
0000950170-24-031518-index-headers.html	Edgar Link	pending
0000950170-24-031518-index.html	Edgar Link	pending
0000950170-24-031518.txt	Edgar Link	pending
0000950170-24-031518-xbrl.zip	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
fusb-20231231.htm	Edgar Link	pending
fusb-20231231.xsd	Edgar Link	pending
fusb-ex21.htm	Edgar Link	pending
fusb-ex23.htm	Edgar Link	pending
fusb-ex31_1.htm	Edgar Link	pending
fusb-ex31_2.htm	Edgar Link	pending
fusb-ex32.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
fusb-20231231_htm.xml	Edgar Link	completed
fusb-ex97.htm	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R100.htm	Edgar Link	pending
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R99.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$FUSB
FIRST US BANCSHARES, INC. Stock $fusb

2024 Q1 Form 10-K Financial Statement

#000095017024031518 Filed on March 14, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FUSB FIRST US BANCSHARES, INC. Stock $fusb

2024 Q1 Form 10-K Financial Statement

#000095017024031518 Filed on March 14, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FUSB
FIRST US BANCSHARES, INC. Stock $fusb