$FUSB
FIRST US BANCSHARES, INC. Stock $fusb

$fusb Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000095017023007191 Filed on March 10, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$285.0K	$11.62M	$41.20M
YoY Change	-96.96%	16.36%	3.2%
Cost Of Revenue			$323.0K
YoY Change			0.31%
Gross Profit			$40.87M
YoY Change			3.22%
Gross Profit Margin			99.22%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development	$169.0K		$682.0K
YoY Change	-1.17%		-24.47%
% of Gross Profit			1.67%
Depreciation & Amortization	$467.0K	$468.0K	$1.882M
YoY Change	1.52%	1.74%	-7.29%
% of Gross Profit			4.6%
Operating Expenses	$1.220M		$5.674M
YoY Change	-7.22%		-7.04%
Operating Profit			$35.20M
YoY Change			5.09%
Interest Expense	$2.526M	$1.730M	$4.256M
YoY Change	275.89%	137.96%	44.27%
% of Operating Profit			12.09%
Other Income/Expense, Net
YoY Change
Pretax Income	$2.724M	$2.936M	$9.012M
YoY Change	54.68%	32.37%	57.39%
Income Tax	$652.0K	$708.0K	$2.148M
% Of Pretax Income	23.94%	24.11%	23.83%
Net Earnings	$2.072M	$2.228M	$6.864M
YoY Change	52.24%	30.22%	54.21%
Net Earnings / Revenue	727.02%	19.17%	16.66%
Basic Earnings Per Share	$0.35	$0.37	$1.13
Diluted Earnings Per Share	$0.33	$350.0K	$1.060M
COMMON SHARES
Basic Shares Outstanding	5.869M	5.812M	6.084M
Diluted Shares Outstanding	6.374M		6.504M

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments	$197.1M	$162.8M
YoY Change	-16.33%	-16.75%
Cash & Equivalents	$68.43M	$30.15M
Short-Term Investments	$128.7M	$132.7M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$24.29M	$24.44M	$24.44M
YoY Change	-10.15%	-2.72%	-10.81%
Goodwill	$7.435M	$7.435M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets			$5.140M
YoY Change			105.6%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.026B	$994.7M	$994.7M
YoY Change	5.93%	3.79%	3.79%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$841.0K	$607.0K	$607.0K
YoY Change	175.74%	203.5%	203.5%
Accrued Expenses	$1.870M	$1.961M	$1.961M
YoY Change	-16.07%	-14.74%	-14.74%
Deferred Revenue
YoY Change
Short-Term Debt	$25.00M	$20.04M	$20.04M
YoY Change		99.46%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$25.84M	$607.0K	$607.0K
YoY Change	920.17%	-75.72%	-75.72%
LONG-TERM LIABILITIES
Long-Term Debt	$10.74M	$10.73M	$10.73M
YoY Change	0.68%	0.24%	0.24%
Other Long-Term Liabilities	$7.431M	$8.136M	$8.136M
YoY Change	66.76%	17.91%	17.91%
Total Long-Term Liabilities	$18.18M	$18.86M	$18.86M
YoY Change	20.15%	7.17%	7.17%
TOTAL LIABILITIES
Total Short-Term Liabilities	$25.84M	$607.0K	$607.0K
Total Long-Term Liabilities	$18.18M	$18.86M	$18.86M
Total Liabilities	$941.9M	$909.5M	$909.5M
YoY Change	6.93%	4.76%	4.76%
SHAREHOLDERS EQUITY
Retained Earnings	$104.4M	$104.5M
YoY Change	4.84%	6.13%
Common Stock	$14.74M	$14.59M
YoY Change	2.68%	2.44%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$26.69M	$26.67M
YoY Change	14.65%	19.45%
Treasury Stock Shares	$1.871M	$1.869M
Shareholders Equity	$84.15M	$85.14M	$85.14M
YoY Change
Total Liabilities & Shareholders Equity	$1.026B	$994.7M	$994.7M
YoY Change	5.93%	3.79%	3.79%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$2.072M	$2.228M	$6.864M
YoY Change	52.24%	30.22%	54.21%
Depreciation, Depletion And Amortization	$467.0K	$468.0K	$1.882M
YoY Change	1.52%	1.74%	-7.29%
Cash From Operating Activities	$3.585M	$3.027M	$12.53M
YoY Change	323.76%	10.88%	27.52%
INVESTING ACTIVITIES
Capital Expenditures	$139.0K	$590.0K	$1.262M
YoY Change	17.8%	-447.06%	53.53%
Acquisitions
YoY Change
Other Investing Activities	$2.326M	-$12.23M	-$78.94M
YoY Change	-89.42%	-31.27%	-26.56%
Cash From Investing Activities	$2.187M	-$12.82M	-$80.20M
YoY Change	-90.0%	-28.68%	-25.96%
FINANCING ACTIVITIES
Cash Dividend Paid	$294.0K		$832.0K
YoY Change	58.92%		11.68%
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	32.50M	3.129M	36.58M
YoY Change	134.14%	152.34%	-44.0%
NET CHANGE
Cash From Operating Activities	3.585M	3.027M	12.53M
Cash From Investing Activities	2.187M	-12.82M	-80.20M
Cash From Financing Activities	32.50M	3.129M	36.58M
Net Change In Cash	38.28M	-6.668M	-31.09M
YoY Change	4.59%	-52.41%	-6.27%
FREE CASH FLOW
Cash From Operating Activities	$3.585M	$3.027M	$12.53M
Capital Expenditures	$139.0K	$590.0K	$1.262M
Free Cash Flow	$3.446M	$2.437M	$11.27M
YoY Change	373.35%	-15.97%	25.15%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0000717806
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Entity Registrant Name EntityRegistrantName	FIRST US BANCSHARES, INC
CY2022	us-gaap	Open Tax Year OpenTaxYear	2014 2015 2016 2017 2018 2019 2020 2021 2022
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	000-14549
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	63-0843362
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	3291 U.S. Highway 280
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Birmingham
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	AL
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	35243
CY2022	dei	City Area Code CityAreaCode	205
CY2022	dei	Local Phone Number LocalPhoneNumber	582-1200
CY2022	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2022	dei	Trading Symbol TradingSymbol	FUSB
CY2022	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	true
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	false
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	60150607
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	5869391
CY2022	dei	Auditor Firm AuditorFirmId	213
CY2022	dei	Auditor Name AuditorName	Carr, Riggs & Ingram, LLC
CY2022	dei	Auditor Location AuditorLocation	Atlanta, Georgia, United States
CY2022Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	11844000
CY2021Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	10843000
CY2022Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	18308000
CY2021Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	50401000
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	30152000
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	61244000
CY2022Q4	us-gaap	Federal Funds Sold FederalFundsSold	1768000
CY2021Q4	us-gaap	Federal Funds Sold FederalFundsSold	82000
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	130795000
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	130883000
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1862000
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	3436000
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	1359000
CY2021Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	870000
CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	9422000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	8320000
CY2022Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	764451000
CY2021Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	700030000
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	21623000
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	21916000
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24439000
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	25123000
CY2022Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	16399000
CY2021Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	16141000
CY2022Q4	us-gaap	Interest Receivable InterestReceivable	3011000
CY2021Q4	us-gaap	Interest Receivable InterestReceivable	2556000
CY2022Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	7801000
CY2021Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	8069000
CY2022Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	686000
CY2021Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2149000
CY2022Q4	us-gaap	Other Assets OtherAssets	11944000
CY2021Q4	us-gaap	Other Assets OtherAssets	7719000
CY2022Q4	us-gaap	Assets Assets	994667000
CY2021Q4	us-gaap	Assets Assets	958302000
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	169822000
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	174501000
CY2022Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	700203000
CY2021Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	663625000
CY2022Q4	us-gaap	Deposits Deposits	870025000
CY2021Q4	us-gaap	Deposits Deposits	838126000
CY2022Q4	us-gaap	Deposit Liabilities Accrued Interest DepositLiabilitiesAccruedInterest	607000
CY2021Q4	us-gaap	Deposit Liabilities Accrued Interest DepositLiabilitiesAccruedInterest	224000
CY2022Q4	us-gaap	Other Liabilities OtherLiabilities	8136000
CY2021Q4	us-gaap	Other Liabilities OtherLiabilities	9189000
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	20038000
CY2021Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	10046000
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	10726000
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	10653000
CY2022Q4	us-gaap	Liabilities Liabilities	909532000
CY2021Q4	us-gaap	Liabilities Liabilities	868238000
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	10000000
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	10000000
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	7680856
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	7634918
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	5812258
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	6172378
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	75000
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	75000
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	14510000
CY2021Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	14163000
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-7241000
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-276000
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	104460000
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	98428000
CY2022Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1868598
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1462540
CY2022Q4	us-gaap	Treasury Stock Value TreasuryStockValue	26669000
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	22326000
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	85135000
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	90064000
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	994667000
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	958302000
CY2022	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	38015000
CY2021	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	38229000
CY2022	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	3182000
CY2021	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	1692000
CY2022	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	41197000
CY2021	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	39921000
CY2022	us-gaap	Interest Expense Deposits InterestExpenseDeposits	3382000
CY2021	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2669000
CY2022	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	874000
CY2021	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	281000
CY2022	us-gaap	Interest Expense InterestExpense	4256000
CY2021	us-gaap	Interest Expense InterestExpense	2950000
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	36941000
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	36971000
CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	3308000
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	2010000
CY2022	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	33633000
CY2021	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	34961000
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-83000
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	22000
CY2022	us-gaap	Lease Income LeaseIncome	864000
CY2021	us-gaap	Lease Income LeaseIncome	830000
CY2022	us-gaap	Noninterest Income Other NoninterestIncomeOther	1516000
CY2021	us-gaap	Noninterest Income Other NoninterestIncomeOther	1600000
CY2022	us-gaap	Noninterest Income NoninterestIncome	3451000
CY2021	us-gaap	Noninterest Income NoninterestIncome	3521000
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	16418000
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	19157000
CY2022	us-gaap	Occupancy Net OccupancyNet	3281000
CY2021	us-gaap	Occupancy Net OccupancyNet	4388000
CY2022	fusb	Computer Services Expense ComputerServicesExpense	1639000
CY2021	fusb	Computer Services Expense ComputerServicesExpense	1832000
CY2022	us-gaap	Professional Fees ProfessionalFees	1060000
CY2021	us-gaap	Professional Fees ProfessionalFees	1275000
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	5674000
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	6104000
CY2022	us-gaap	Noninterest Expense NoninterestExpense	28072000
CY2021	us-gaap	Noninterest Expense NoninterestExpense	32756000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	9012000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5726000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2148000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1275000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	6864000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	4451000
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.13
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.06
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.12
CY2022	us-gaap	Profit Loss ProfitLoss	6864000
CY2021	us-gaap	Profit Loss ProfitLoss	4451000
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-2844000
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-369000
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-8534000
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1106000
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	21000
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-6000
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-62000
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	16000
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	480000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	298000
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	1437000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	898000
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	25000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0
CY2022	fusb	Other Comprehensive Income Loss Reclassification Adjustment Net Gains On Cash Flow Hedge Derivatives Realized In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentNetGainsOnCashFlowHedgeDerivativesRealizedInNetIncomeNetOfTax	70000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-6965000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-224000
CY2022	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-101000
CY2021	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	4227000
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	86678000
CY2021	us-gaap	Profit Loss ProfitLoss	4451000
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1122000
CY2021	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease After Adjustments Tax Noncontrolling Interest1 OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsTaxNoncontrollingInterest1	898000
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.12
CY2021	us-gaap	Dividends Common Stock DividendsCommonStock	745000
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	429000
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	525000
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	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	4481000
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	85135000
CY2022	us-gaap	Profit Loss ProfitLoss	6864000
CY2021	us-gaap	Profit Loss ProfitLoss	4451000
CY2022	fusb	Depreciation And Amortization Of Property Plant And Equipment And Computer Programs DepreciationAndAmortizationOfPropertyPlantAndEquipmentAndComputerPrograms	1614000
CY2021	fusb	Depreciation And Amortization Of Property Plant And Equipment And Computer Programs DepreciationAndAmortizationOfPropertyPlantAndEquipmentAndComputerPrograms	1692000
CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	3308000
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	2010000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-367000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-401000
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-83000
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	22000
CY2022	fusb	Cash Received In Settlement Of Derivatives Contracts CashReceivedInSettlementOfDerivativesContracts	324000
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	485000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	436000
CY2022	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	195000
CY2021	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	338000
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	268000
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	341000
CY2022	fusb	Gains Losses On Sales Of Premises Equipment And Other Real Estate Held For Sale GainsLossesOnSalesOfPremisesEquipmentAndOtherRealEstateHeldForSale	207000
CY2021	fusb	Gains Losses On Sales Of Premises Equipment And Other Real Estate Held For Sale GainsLossesOnSalesOfPremisesEquipmentAndOtherRealEstateHeldForSale	53000
CY2022	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	455000
CY2021	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-251000
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-333000
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1137000
CY2022	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	383000
CY2021	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-68000
CY2022	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-299000
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-287000
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	12529000
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9825000
CY2022	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	-1686000
CY2021	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	3000
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	39255000
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	86642000
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	8531000
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	19250000
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	38975000
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	1563000
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	2957000
CY2022	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	489000
CY2021	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-265000
CY2022	fusb	Proceeds From Sale Of Premises And Equipment And Other Real Estate ProceedsFromSaleOfPremisesAndEquipmentAndOtherRealEstate	3084000
CY2021	fusb	Proceeds From Sale Of Premises And Equipment And Other Real Estate ProceedsFromSaleOfPremisesAndEquipmentAndOtherRealEstate	2061000
CY2022	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	69935000
CY2021	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	65112000
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1262000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	822000
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-80199000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-108315000
CY2022	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	31899000
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	55914000
CY2022	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	9992000
CY2021	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	29000
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	10653000
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	7000
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4481000
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	525000
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	832000
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	745000
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	36578000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	65319000
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-31092000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-33171000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	61244000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	94415000
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
CY2022	us-gaap	Nature Of Operations NatureOfOperations	<div style="text-indent:0.0%;display:flex;margin-top:10.0pt;justify-content:flex-start;align-items:baseline;margin-bottom:0.0pt;min-width:5.065%;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:bold;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;text-indent:0;display:inline-flex;font-size:10.0pt;font-family:Times New Roman;justify-content:flex-start;min-width:5.065%;">1.</span><div style="display:inline;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:bold;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">DESCRIPTION OF BUSINESS</span></div></div><p style="margin-left:5.0%;text-indent:7.018%;font-size:10.0pt;margin-top:10.0pt;font-family:Times New Roman;margin-bottom:8.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">First US Bancshares, Inc., a Delaware corporation (“Bancshares” and, together with its subsidiaries, 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:5.0%;text-indent:7.018%;font-size:10.0pt;margin-top:10.0pt;font-family:Times New Roman;margin-bottom:8.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;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:10.0pt;font-family:"Times New Roman", serif;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">12</span></span><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;"> states, including Alabama, Florida, Georgia, Kentucky, Mississippi, Missouri, North Carolina, Oklahoma, South Carolina, Tennessee, Texas and Virginia. During the third quarter of 2021, the Company closed four banking offices located in Bucksville, Columbiana and south Tuscaloosa, Alabama, as well as Ewing, Virginia.</span></p><p style="margin-left:5.0%;text-indent:7.018%;font-size:10.0pt;margin-top:10.0pt;font-family:Times New Roman;margin-bottom:8.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">The Bank has two wholly owned subsidiaries: Acceptance Loan Company, Inc., an Alabama corporation (“ALC”), and FUSB Reinsurance, Inc., an Arizona corporation (“FUSB Reinsurance”). As used herein, unless the context suggests otherwise, references to the “Company,” “we,” “us” and “our” refer to Bancshares, as well as the Bank, ALC, and FUSB Reinsurance, collectively.</span></p><p style="margin-left:5.0%;text-indent:7.018%;font-size:10.0pt;margin-top:10.0pt;font-family:Times New Roman;margin-bottom:8.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">The Bank owns all of the stock of ALC. ALC is a finance company headquartered in Mobile, Alabama. During the third quarter of 2021, ALC ceased new business development and permanently closed its </span><span style="font-size:10.0pt;font-family:"Times New Roman", serif;background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">20</span><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;"> branch lending locations in Alabama and Mississippi to the public. ALC continues to service its remaining portfolio of loans from its headquarters in Mobile, Alabama.</span></p><p style="margin-left:5.0%;text-indent:7.018%;font-size:10.0pt;margin-top:10.0pt;font-family:Times New Roman;margin-bottom:8.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">FUSB Reinsurance was designed to reinsure or “underwrite” credit life and credit accident and health insurance policies sold to the Bank’s and ALC’s consumer loan customers. FUSB Reinsurance was responsible for the first level of risk on these policies up to a specified maximum amount, while the primary third-party insurer retained the remaining risk. While FUSB Reinsurance underwrote insurance contracts for both the Bank and ALC, in recent years, the majority of contracts were associated with ALC’s loans. Due to reduced contract volume, particularly following the cessation of business of ALC, during 2022, management of FUSB Reinsurance began procedures to terminate the entity’s activities. During 2022, FUSB Reinsurance ceased writing new insurance contracts, and reached an agreement with a third-party insurance provider to indemnify FUSB Reinsurance for all remaining liabilities associated with previously underwritten insurance policies. As of December 31, 2022, the remaining assets and liabilities of FUSB Reinsurance were transferred to the Bank, and it is anticipated that FUSB Reinsurance will be legally dissolved during 2023.</span><span style="color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;"> </span></p>
CY2022	fusb	Number Of States NumberOfStates	12
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<p style="text-indent:5.0%;font-size:10.0pt;margin-top:10.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:bold;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">Use of Estimates</span></p><p style="margin-left:5.0%;text-indent:0.0%;font-size:10.0pt;margin-top:10.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;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:5.0%;text-indent:0.0%;font-size:10.0pt;margin-top:10.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;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 loan and lease 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 loan losses and OREO, management generally obtains independent appraisals for significant properties, evaluates the overall portfolio characteristics and delinquencies and monitors economic conditions.</span></p>
CY2022	fusb	Maximum Maturity Period For Cash Equivalents MaximumMaturityPeriodForCashEquivalents	P90D
CY2022	us-gaap	Interest Paid Net InterestPaidNet	3873000
CY2021	us-gaap	Interest Paid Net InterestPaidNet	3018000
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2855000
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1375000
CY2022	us-gaap	Mortgage Loans On Real Estate Foreclosures MortgageLoansOnRealEstateForeclosures	907000
CY2021	us-gaap	Mortgage Loans On Real Estate Foreclosures MortgageLoansOnRealEstateForeclosures	806000
CY2022	fusb	Closed Branch Assets Transferred To Other Real Estate ClosedBranchAssetsTransferredToOtherRealEstate	391000
CY2021	fusb	Closed Branch Assets Transferred To Other Real Estate ClosedBranchAssetsTransferredToOtherRealEstate	1978000
CY2022	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	138000
CY2021	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	59000
CY2022	fusb	Number Of Investment Portfolios NumberOfInvestmentPortfolios	3
CY2021	fusb	Number Of Securities Held As Trading Securities NumberOfSecuritiesHeldAsTradingSecurities	0
CY2022	fusb	Number Of Securities Held As Trading Securities NumberOfSecuritiesHeldAsTradingSecurities	0
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	977000
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	770000
CY2022	us-gaap	Property Plant And Equipment Estimated Useful Lives PropertyPlantAndEquipmentEstimatedUsefulLives	three to forty years
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	130883000
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	3436000
CY2021Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	41000
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	3477000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	511000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	511000
CY2022	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<p style="margin-left:5.0%;text-indent:0.0%;font-size:10.0pt;margin-top:10.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:bold;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">Reclassification</span></p><p style="margin-left:5.0%;text-indent:0.0%;font-size:10.0pt;margin-top:10.0pt;font-family:Times New Roman;margin-bottom:0.0pt;text-align:left;"><span style="background-color:rgba(0,0,0,0);color:rgba(0,0,0,1);white-space:pre-wrap;font-weight:normal;font-size:10.0pt;font-family:"Times New Roman", serif;min-width:fit-content;">Certain disclosures in the notes to the prior period consolidated financial statements have been reclassified to conform to the 2022 presentation. These reclassifications had no effect on the Company’s results of operations, financial position or net cash flow.</span></p>
CY2022	fusb	Weighted Average Number Of Shares Outstanding WeightedAverageNumberOfSharesOutstanding	5969575
CY2021	fusb	Weighted Average Number Of Shares Outstanding WeightedAverageNumberOfSharesOutstanding	6205261
CY2022	fusb	Weighted Average Director Deferred Shares WeightedAverageDirectorDeferredShares	114483
CY2021	fusb	Weighted Average Director Deferred Shares WeightedAverageDirectorDeferredShares	114096
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6084058
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6319357
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	419650
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	420250
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6503708
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6739607
CY2022	us-gaap	Net Income Loss NetIncomeLoss	6864000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	4451000
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.13
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.06
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
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
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	130676000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	61068000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	57159000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	67309000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	60872000
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	1606000
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1536000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	12995000
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	12253000
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	256000
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	233000
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	141883000
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	130795000
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1862000
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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
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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
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	82923000
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	731000
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	3417000
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	39000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	38
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CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	10
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	32
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CY2022Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	200000
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	300000
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CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	9422000
CY2022Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	5521000
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CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	8253000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	8320000
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CY2021Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	100000
CY2022Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	5154000
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CY2022Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	367000
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	259000
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CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	2525000
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	2525000
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	73000
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	73000
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	67000
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CY2022	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	60000
CY2021	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3809000
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CY2022Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	1700000
CY2021Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	2000000.0
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CY2021	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	52000
CY2022Q4	fusb	Interest Income Recorded InterestIncomeRecorded	29000
CY2021Q4	fusb	Interest Income Recorded InterestIncomeRecorded	30000
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CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0
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CY2021Q4	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
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	4
CY2021	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	715000
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	660000
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
CY2021Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2149000
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	949000
CY2022	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	411000
CY2021	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1981000
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CY2021	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1205000
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CY2021	fusb	Other Real Estate Gross Gains OtherRealEstateGrossGains	491000
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CY2021	fusb	Other Real Estate Net Income Loss OtherRealEstateNetIncomeLoss	491000
CY2022	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	1000
CY2021	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	67000
CY2022Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	686000
CY2021Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2149000
CY2022Q4	fusb	Foreclosed Real Estate Owned Fair Value Less Disposal Costs ForeclosedRealEstateOwnedFairValueLessDisposalCosts	20000
CY2021Q4	fusb	Foreclosed Real Estate Owned Fair Value Less Disposal Costs ForeclosedRealEstateOwnedFairValueLessDisposalCosts	151000
CY2022Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	0
CY2021Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	0
CY2021Q4	us-gaap	Goodwill Goodwill	7400000
CY2022Q4	us-gaap	Goodwill Goodwill	7400000
CY2022Q4	us-gaap	Goodwill Goodwill	7435000
CY2021Q4	us-gaap	Goodwill Goodwill	7435000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	2048000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	2048000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1682000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1414000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	366000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	634000
CY2022Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	7801000
CY2021Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	8069000
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CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	366000
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CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	47039000
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CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	21916000
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24439000
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	25123000
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1600000
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1700000
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CY2022Q4	us-gaap	Time Deposits TimeDeposits	252712000
CY2022Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	29500000
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CY2022Q4	fusb	Brokered Certificates Of Deposit BrokeredCertificatesOfDeposit	62500000
CY2021Q4	fusb	Brokered Certificates Of Deposit BrokeredCertificatesOfDeposit	32000000.0
CY2022Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	4100000
CY2021Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	4200000
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CY2021Q4	us-gaap	Federal Funds Purchased FederalFundsPurchased	0
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	38000
CY2021Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	46000
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	20000000.0
CY2021Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	10000000.0
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	0
CY2021Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	0
CY2022Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	68200000
CY2021Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	66600000
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	50000000.0
CY2021Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	40000000.0
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CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2025000
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1522000
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-291000
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-527000
CY2022	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	1734000
CY2021	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	995000
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	490000
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	154000
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-76000
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	126000
CY2022	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	414000
CY2021	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	280000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2148000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1275000
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1892000
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1202000
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	76000
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	88000
CY2022	fusb	Income Tax Reconciliation Deductions Life Insurance Amount IncomeTaxReconciliationDeductionsLifeInsuranceAmount	62000
CY2021	fusb	Income Tax Reconciliation Deductions Life Insurance Amount IncomeTaxReconciliationDeductionsLifeInsuranceAmount	62000
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	329000
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	169000
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	65000
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	54000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2148000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1275000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	2333000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	2065000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	895000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	947000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	407000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	243000
CY2022Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	2715000
CY2021Q4	fusb	Deferred Tax Assets Unrealized Losses On Derivatives Designated As Cash Flow Hedges DeferredTaxAssetsUnrealizedLossesOnDerivativesDesignatedAsCashFlowHedges	144000
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	905000
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	862000
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	7255000
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	4261000
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1288000
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1248000
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	91000
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	158000
CY2022Q4	fusb	Deferred Tax Liabilities Partnerships DeferredTaxLiabilitiesPartnerships	94000
CY2021Q4	fusb	Deferred Tax Liabilities Partnerships DeferredTaxLiabilitiesPartnerships	87000
CY2021Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	52000
CY2022Q4	fusb	Deferred Tax Liabilities Unrealized Gains On Cash Flow Hedges DeferredTaxLiabilitiesUnrealizedGainsOnCashFlowHedges	301000
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	341000
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	266000
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2115000
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1811000
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	5140000
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2450000
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2022	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	0
CY2022Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0
CY2022Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	0
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	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
CY2021	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
CY2022	fusb	Defined Contribution Plan Discretionary Contribution Percent DefinedContributionPlanDiscretionaryContributionPercent	0.02
CY2022	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	400000
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	500000
CY2022	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.20
CY2022Q4	us-gaap	Defined Benefit Plan Number Of Shares Of Equity Securities Issued By Employer And Related Parties Included In Plan Assets DefinedBenefitPlanNumberOfSharesOfEquitySecuritiesIssuedByEmployerAndRelatedPartiesIncludedInPlanAssets	184987
CY2021Q4	us-gaap	Defined Benefit Plan Number Of Shares Of Equity Securities Issued By Employer And Related Parties Included In Plan Assets DefinedBenefitPlanNumberOfSharesOfEquitySecuritiesIssuedByEmployerAndRelatedPartiesIncludedInPlanAssets	238514
CY2022Q4	us-gaap	Deferred Compensation Arrangement With Individual Common Stock Reserved For Future Issuance DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance	114190
CY2021Q4	us-gaap	Deferred Compensation Arrangement With Individual Common Stock Reserved For Future Issuance DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance	117825
CY2022	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
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
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	421000
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	9.79
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
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
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
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	750
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	8.23
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
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0
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
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
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	395678
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	9.74
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	100000
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	600000
CY2022	us-gaap	Dividends Common Stock DividendsCommonStock	800000
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.14
CY2021	us-gaap	Dividends Common Stock DividendsCommonStock	700000
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.12
CY2022	fusb	Capital Conservation Buffer Rate CapitalConservationBufferRate	0.0250
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	0.0850
CY2022Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.0800
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	0.1050
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
CY2021Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	87379000
CY2021Q4	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.1136
CY2021Q4	fusb	Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0700
CY2021Q4	fusb	Common Equity Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Asset CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAsset	0.0650
CY2021Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	87379000
CY2021Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1136
CY2021Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0850
CY2021Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.0800
CY2021Q4	us-gaap	Capital Capital	95699000
CY2021Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1244
CY2021Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.1050
CY2021Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.1000
CY2021Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	87379000
CY2021Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0917
CY2021Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2021Q4	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	0.0500
CY2022	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.
CY2022Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2022	fusb	Lessee Operating Lease Period Of Option To Terminate LesseeOperatingLeasePeriodOfOptionToTerminate	P1Y
CY2022	us-gaap	Lease Cost LeaseCost	434000
CY2021	us-gaap	Lease Cost LeaseCost	999000
CY2022	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	864000
CY2021	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	830000
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1883000
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2245000
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1961000
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	2317000
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y10D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y10M24D
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0330
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0329
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	427000
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	859000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	432000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	438000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	339000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	346000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	353000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	238000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2146000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	185000
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1961000
CY2022Q4	us-gaap	Assets Under Management Carrying Amount AssetsUnderManagementCarryingAmount	32233000
CY2022Q4	us-gaap	Hedged Asset Fair Value Hedge Cumulative Increase Decrease HedgedAssetFairValueHedgeCumulativeIncreaseDecrease	1101000
CY2022Q4	fusb	Amortized Cost Basis Of Closed Portfolios Used In Hedging Relationships AmortizedCostBasisOfClosedPortfoliosUsedInHedgingRelationships	33300000
CY2022Q4	fusb	Cumulative Basis Adjustments Associated With Hedging Relationships CumulativeBasisAdjustmentsAssociatedWithHedgingRelationships	1100000
CY2022Q4	us-gaap	Derivative Amount Of Hedged Item DerivativeAmountOfHedgedItem	20000000
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2022	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	41197000
CY2022	us-gaap	Interest Expense InterestExpense	4256000
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	36941000
CY2022	fusb	Provision Reduction In Reserve For Loan Losses ProvisionReductionInReserveForLoanLosses	3308000
CY2022	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	33633000
CY2022	us-gaap	Noninterest Income NoninterestIncome	3451000
CY2022	us-gaap	Noninterest Expense NoninterestExpense	28072000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	9012000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2148000
CY2022	us-gaap	Profit Loss ProfitLoss	6864000
CY2022Q4	us-gaap	Assets Assets	994667000
CY2022Q4	us-gaap	Marketable Securities MarketableSecurities	132657000
CY2022Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	764451000
CY2022Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	7801000
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1262000
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1614000
CY2022	fusb	Interest Income From External Customers InterestIncomeFromExternalCustomers	41197000
CY2021	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	39921000
CY2021	us-gaap	Interest Expense InterestExpense	2950000
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	36971000
CY2021	fusb	Provision Reduction In Reserve For Loan Losses ProvisionReductionInReserveForLoanLosses	2010000
CY2021	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	34961000
CY2021	us-gaap	Noninterest Income NoninterestIncome	3521000
CY2021	us-gaap	Noninterest Expense NoninterestExpense	32756000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5726000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1275000
CY2021	us-gaap	Profit Loss ProfitLoss	4451000
CY2021Q4	us-gaap	Assets Assets	958302000
CY2021Q4	us-gaap	Marketable Securities MarketableSecurities	134319000
CY2021Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	700030000
CY2021Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	8069000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	822000
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1692000
CY2021	fusb	Interest Income From External Customers InterestIncomeFromExternalCustomers	39921000
CY2022	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	451000
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	439000
CY2022	fusb	Credit Insurance Commissions And Fees CreditInsuranceCommissionsAndFees	-93000
CY2021	fusb	Credit Insurance Commissions And Fees CreditInsuranceCommissionsAndFees	192000
CY2022	fusb	Other Income Atm Fees OtherIncomeATMFees	532000
CY2021	fusb	Other Income Atm Fees OtherIncomeATMFees	577000
CY2022	fusb	Mortgage Fees From Secondary Market MortgageFeesFromSecondaryMarket	17000
CY2021	fusb	Mortgage Fees From Secondary Market MortgageFeesFromSecondaryMarket	23000
CY2022	fusb	Wire Transfer Fees WireTransferFees	52000
CY2021	fusb	Wire Transfer Fees WireTransferFees	64000
CY2022	fusb	Gain On Sales Of Premises And Equipment And Other Assets GainOnSalesOfPremisesAndEquipmentAndOtherAssets	301000
CY2021	fusb	Gain On Sales Of Premises And Equipment And Other Assets GainOnSalesOfPremisesAndEquipmentAndOtherAssets	19000
CY2022	us-gaap	Other Income OtherIncome	256000
CY2021	us-gaap	Other Income OtherIncome	286000
CY2022	us-gaap	Noninterest Income Other NoninterestIncomeOther	1516000
CY2021	us-gaap	Noninterest Income Other NoninterestIncomeOther	1600000
CY2022	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	614000
CY2021	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	802000
CY2022	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	682000
CY2021	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	903000
CY2022	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	189000
CY2021	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	167000
CY2022	fusb	Business Development And Travel BusinessDevelopmentAndTravel	225000
CY2021	fusb	Business Development And Travel BusinessDevelopmentAndTravel	147000
CY2022	fusb	Collection And Recoveries CollectionAndRecoveries	261000
CY2021	fusb	Collection And Recoveries CollectionAndRecoveries	168000
CY2022	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	323000
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	322000
CY2022	us-gaap	General Insurance Expense GeneralInsuranceExpense	566000
CY2021	us-gaap	General Insurance Expense GeneralInsuranceExpense	635000
CY2022	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	684000
CY2021	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	726000
CY2022	fusb	Loss On Sales Of Premises And Equipment And Other Assets LossOnSalesOfPremisesAndEquipmentAndOtherAssets	69000
CY2021	fusb	Loss On Sales Of Premises And Equipment And Other Assets LossOnSalesOfPremisesAndEquipmentAndOtherAssets	150000
CY2022	fusb	Foreclosed Real Estate Other Expense Net Of Gain Or Loss On Sale ForeclosedRealEstateOtherExpenseNetOfGainOrLossOnSale	-331000
CY2021	fusb	Foreclosed Real Estate Other Expense Net Of Gain Or Loss On Sale ForeclosedRealEstateOtherExpenseNetOfGainOrLossOnSale	-371000
CY2022	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2124000
CY2021	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2114000
CY2022	us-gaap	Operating Expenses OperatingExpenses	5674000
CY2021	us-gaap	Operating Expenses OperatingExpenses	6104000
CY2022Q4	fusb	Securities Committed To Sell Amount SecuritiesCommittedToSellAmount	0
CY2021Q4	fusb	Securities Committed To Sell Amount SecuritiesCommittedToSellAmount	0
CY2022	fusb	Credit Losses Associated With Derivative Contracts CreditLossesAssociatedWithDerivativeContracts	0
CY2021	fusb	Credit Losses Associated With Derivative Contracts CreditLossesAssociatedWithDerivativeContracts	0
CY2022Q4	us-gaap	Self Insurance Reserve SelfInsuranceReserve	200000
CY2021Q4	us-gaap	Self Insurance Reserve SelfInsuranceReserve	200000
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
CY2021Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9987000
CY2021Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10030000
CY2021Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10059000
CY2021Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9845000
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
CY2021Q4	us-gaap	Interest Expense InterestExpense	727000
CY2021Q3	us-gaap	Interest Expense InterestExpense	695000
CY2021Q2	us-gaap	Interest Expense InterestExpense	747000
CY2021Q1	us-gaap	Interest Expense InterestExpense	781000
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
CY2021Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9260000
CY2021Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9335000
CY2021Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9312000
CY2021Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9064000
CY2022Q4	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	527000
CY2022Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	1165000
CY2022Q2	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	895000
CY2022Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	721000
CY2021Q4	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	493000
CY2021Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	618000
CY2021Q2	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	498000
CY2021Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	401000
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
CY2021Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8767000
CY2021Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8717000
CY2021Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8814000
CY2021Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8663000
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
CY2021Q4	us-gaap	Noninterest Income NoninterestIncome	865000
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	896000
CY2021Q2	us-gaap	Noninterest Income NoninterestIncome	809000
CY2021Q1	us-gaap	Noninterest Income NoninterestIncome	951000
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
CY2021Q4	us-gaap	Noninterest Expense NoninterestExpense	7414000
CY2021Q3	us-gaap	Noninterest Expense NoninterestExpense	8547000
CY2021Q2	us-gaap	Noninterest Expense NoninterestExpense	8399000
CY2021Q1	us-gaap	Noninterest Expense NoninterestExpense	8396000
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
CY2021Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2218000
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1066000
CY2021Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1224000
CY2021Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1218000
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
CY2021Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	507000
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	229000
CY2021Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	271000
CY2021Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	268000
CY2022Q4	us-gaap	Profit Loss ProfitLoss	2228000
CY2022Q3	us-gaap	Profit Loss ProfitLoss	1860000
CY2022Q2	us-gaap	Profit Loss ProfitLoss	1415000
CY2022Q1	us-gaap	Profit Loss ProfitLoss	1361000
CY2021Q4	us-gaap	Profit Loss ProfitLoss	1711000
CY2021Q3	us-gaap	Profit Loss ProfitLoss	837000
CY2021Q2	us-gaap	Profit Loss ProfitLoss	953000
CY2021Q1	us-gaap	Profit Loss ProfitLoss	950000
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
CY2021Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.13
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.15
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.15
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
CY2021Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.13
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14

Files In Submission

Name	View Source	Status
0000950170-23-007191-index-headers.html	Edgar Link	pending
0000950170-23-007191-index.html	Edgar Link	pending
0000950170-23-007191.txt	Edgar Link	pending
0000950170-23-007191-xbrl.zip	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
fusb-20221231.htm	Edgar Link	pending
fusb-20221231.xsd	Edgar Link	pending
fusb-ex10_5.htm	Edgar Link	pending
fusb-20221231_cal.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
fusb-20221231_def.xml	Edgar Link	unprocessable
fusb-20221231_lab.xml	Edgar Link	unprocessable
fusb-20221231_pre.xml	Edgar Link	unprocessable
fusb-20221231_htm.xml	Edgar Link	completed
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
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$FUSB
FIRST US BANCSHARES, INC. Stock $fusb

2023 Q1 Form 10-K Financial Statement

#000095017023007191 Filed on March 10, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FUSB FIRST US BANCSHARES, INC. Stock $fusb

2023 Q1 Form 10-K Financial Statement

#000095017023007191 Filed on March 10, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FUSB
FIRST US BANCSHARES, INC. Stock $fusb