$FUSB
FIRST US BANCSHARES, INC. Stock $fusb

$fusb Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000156459022010052 Filed on March 14, 2022

Income Statement

Concept	2021 Q4	2021 Q3	2021
Revenue	$9.987M	$10.03M	$39.92M
YoY Change	-2.13%	0.34%	-1.13%
Cost Of Revenue		$129.0K	$322.0K
YoY Change		48.28%	-0.92%
Gross Profit		$9.901M	$39.60M
YoY Change		-0.08%	-1.13%
Gross Profit Margin		98.71%	99.19%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development		$283.0K	$903.0K
YoY Change		21.98%	-0.55%
% of Gross Profit		2.86%	2.28%
Depreciation & Amortization	$460.0K	$510.0K	$2.030M
YoY Change	-14.81%	-3.77%	-3.33%
% of Gross Profit		5.15%	5.13%
Operating Expenses		$1.490M	$6.104M
YoY Change		-14.17%	-5.88%
Operating Profit		$8.411M	$33.50M
YoY Change		2.91%	-0.21%
Interest Expense	$727.0K	$695.0K	$2.950M
YoY Change	-20.29%	-32.59%	-36.02%
% of Operating Profit		8.26%	8.81%
Other Income/Expense, Net
YoY Change
Pretax Income	$2.218M	$1.066M	$5.726M
YoY Change	63.81%	94.88%	62.12%
Income Tax	$507.0K	$229.0K	$1.275M
% Of Pretax Income	22.86%	21.48%	22.27%
Net Earnings	$1.711M	$837.0K	$4.451M
YoY Change	63.73%	103.65%	64.43%
Net Earnings / Revenue	17.13%	8.34%	11.15%
Basic Earnings Per Share	$0.27	$0.13	$0.70
Diluted Earnings Per Share	$0.25	$0.13	$0.66
COMMON SHARES
Basic Shares Outstanding		6.332M	6.319M
Diluted Shares Outstanding		6.752M	6.740M

Balance Sheet

Concept	2021 Q4	2021 Q3	2021
SHORT-TERM ASSETS
Cash & Short-Term Investments	$195.6M	$196.7M
YoY Change	5.23%	23.69%
Cash & Equivalents	$61.24M	$75.26M
Short-Term Investments	$134.3M	$121.5M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$25.12M	$28.10M	$27.40M
YoY Change	-10.93%	-10.51%	-12.46%
Goodwill	$7.435M	$7.435M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets			$2.500M
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$958.3M	$956.7M	$958.3M
YoY Change	7.61%	12.17%	7.61%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$200.0K	$200.0K	$200.0K
YoY Change	-33.33%	-50.0%	-33.33%
Accrued Expenses	$2.300M	$2.700M	$2.300M
YoY Change	-25.81%	-15.63%	-25.81%
Deferred Revenue
YoY Change
Short-Term Debt	$10.05M	$10.00M
YoY Change	0.29%	0.0%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$2.500M	$2.900M	$2.500M
YoY Change	-26.47%	-19.44%	-26.47%
LONG-TERM LIABILITIES
Long-Term Debt	$10.70M	$0.00	$10.70M
YoY Change
Other Long-Term Liabilities	$6.900M	$7.300M	$6.900M
YoY Change	-15.85%	-13.1%	-15.85%
Total Long-Term Liabilities	$17.60M	$7.300M	$17.60M
YoY Change	114.63%	-13.1%	114.63%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.500M	$2.900M	$2.500M
Total Long-Term Liabilities	$17.60M	$7.300M	$17.60M
Total Liabilities	$868.2M	$867.1M	$868.2M
YoY Change	8.01%	13.01%	8.01%
SHAREHOLDERS EQUITY
Retained Earnings	$98.43M
YoY Change	3.91%
Common Stock	$14.24M
YoY Change	2.72%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$22.33M
YoY Change	2.16%
Treasury Stock Shares	$1.463M
Shareholders Equity	$90.10M	$89.60M	$90.10M
YoY Change
Total Liabilities & Shareholders Equity	$958.3M	$956.7M	$958.3M
YoY Change	7.61%	12.17%	7.61%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2021
OPERATING ACTIVITIES
Net Income	$1.711M	$837.0K	$4.451M
YoY Change	63.73%	103.65%	64.43%
Depreciation, Depletion And Amortization	$460.0K	$510.0K	$2.030M
YoY Change	-14.81%	-3.77%	-3.33%
Cash From Operating Activities	$2.730M	$1.910M	$9.825M
YoY Change	32.52%	17.9%	61.22%
INVESTING ACTIVITIES
Capital Expenditures	-$170.0K	-$110.0K	$822.0K
YoY Change	-50.0%	-169.62%	-13.93%
Acquisitions
YoY Change
Other Investing Activities	-$17.80M	-$17.15M	-$107.5M
YoY Change	85.03%	-66.15%	65.12%
Cash From Investing Activities	-$17.98M	-$17.26M	-$108.3M
YoY Change	80.52%	-66.04%	63.97%
FINANCING ACTIVITIES
Cash Dividend Paid			$745.0K
YoY Change			0.68%
Common Stock Issuance & Retirement, Net			$525.0K
YoY Change			16.15%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	1.240M	8.790M	65.32M
YoY Change	-96.62%	33.79%	-32.9%
NET CHANGE
Cash From Operating Activities	2.730M	1.910M	9.825M
Cash From Investing Activities	-17.98M	-17.26M	-108.3M
Cash From Financing Activities	1.240M	8.790M	65.32M
Net Change In Cash	-14.01M	-6.560M	-33.17M
YoY Change	-148.71%	-84.61%	-188.73%
FREE CASH FLOW
Cash From Operating Activities	$2.730M	$1.910M	$9.825M
Capital Expenditures	-$170.0K	-$110.0K	$822.0K
Free Cash Flow	$2.900M	$2.020M	$9.003M
YoY Change	20.83%	38.17%	75.19%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2021	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	68114307
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	84993000
CY2021	us-gaap	Open Tax Year OpenTaxYear	2014 2015 2016 2017 2018 2019 2020 2021
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P7Y6M
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y10M24D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y9M14D
CY2021	dei	Auditor Firm AuditorFirmId	213
CY2021	dei	Auditor Name AuditorName	Carr, Riggs & Ingram, LLC
CY2021	dei	Auditor Location AuditorLocation	Atlanta, Georgia, United States
CY2021Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	10843000
CY2020Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	12235000
CY2021Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	50401000
CY2020Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	82180000
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	61244000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	94415000
CY2021Q4	us-gaap	Federal Funds Sold FederalFundsSold	82000
CY2020Q4	us-gaap	Federal Funds Sold FederalFundsSold	85000
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	130883000
CY2021	us-gaap	Interest Expense InterestExpense	2950000
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	35766000
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	34888000
CY2020	fusb	Auto Club Revenue AutoClubRevenue	126000
CY2020	fusb	Other Income Atm Fees OtherIncomeATMFees	479000
CY2020Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	4279000
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	3436000
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6429000
CY2021Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	870000
CY2020Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	1135000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	8320000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7470000
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CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	638374000
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	21916000
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	23774000
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	25123000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	28206000
CY2021Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	16141000
CY2020Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	15846000
CY2021Q4	us-gaap	Interest Receivable InterestReceivable	2556000
CY2020Q4	us-gaap	Interest Receivable InterestReceivable	2807000
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CY2020Q4	us-gaap	Other Liabilities OtherLiabilities	11312000
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CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	341000
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	415000
CY2021	fusb	Gains Losses On Sales Of Premises Equipment And Other Real Estate Held For Sale GainsLossesOnSalesOfPremisesEquipmentAndOtherRealEstateHeldForSale	53000
CY2020	fusb	Gains Losses On Sales Of Premises Equipment And Other Real Estate Held For Sale GainsLossesOnSalesOfPremisesEquipmentAndOtherRealEstateHeldForSale	-151000
CY2021	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-251000
CY2020	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	319000
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1137000
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1414000
CY2021	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-68000
CY2020	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-245000
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-287000
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1065000
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9825000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	6094000
CY2021	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	3000
CY2020	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	9995000
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	86642000
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	36328000
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	12203000
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	38975000
CY2021Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	10000000.0
CY2021Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	0
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	2957000
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	7837000
CY2021	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-265000
CY2020	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-2000
CY2021	fusb	Proceeds From Sale Of Premises And Equipment And Other Real Estate ProceedsFromSaleOfPremisesAndEquipmentAndOtherRealEstate	2061000
CY2020	fusb	Proceeds From Sale Of Premises And Equipment And Other Real Estate ProceedsFromSaleOfPremisesAndEquipmentAndOtherRealEstate	2619000
CY2021	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	65112000
CY2020	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	96320000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	822000
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	955000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-108315000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-66059000
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	55914000
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	98550000
CY2021	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	29000
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-8000
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
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	525000
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	452000
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	745000
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	740000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	65319000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	97350000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-33171000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	37385000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	94415000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	57030000
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
CY2021	us-gaap	Nature Of Operations NatureOfOperations	<div style="align:left;"> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse:collapse; width:100%;"> <tr> <td style="width:5%;white-space:nowrap" valign="top"> <p style="margin-bottom:0pt;margin-top:10pt;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;"><span style="font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">1.</span></p></td> <td valign="top"> <p style="margin-bottom:0pt;margin-top:10pt;font-weight:bold;font-style:normal;text-transform:none;font-variant: normal;font-family:Times New Roman;font-size:12pt;"><span style="font-weight:normal;"/><span style="font-size:10pt;">DESCRIPTION OF BUSINESS</span></p></td></tr></table></div> <p style="margin-bottom:0pt;margin-top:10pt;margin-left:5%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">First US Bancshares, Inc. (“Bancshares”) and its wholly-owned subsidiary, First US Bank (the “Bank”), provide commercial banking services to customers through 15 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. In addition, the Bank operates 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 12 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. Both Bancshares and the Bank are headquartered in Birmingham, Alabama.</p> <p style="margin-bottom:0pt;margin-top:10pt;margin-left:5%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The Bank owns all of the stock of Acceptance Loan Company, Inc., an Alabama corporation (“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 20 branch lending locations in Alabama and Mississippi to the public.</p> <p style="margin-bottom:0pt;margin-top:10pt;margin-left:5%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The Bank also owns all of the stock of FUSB Reinsurance, Inc. (“FUSB Reinsurance”), an Arizona corporation. FUSB Reinsurance is an insurance company that underwrites credit life and accidental death insurance related to consumer loans written by the Bank and ALC.</p> <p style="margin-top:10pt;margin-bottom:8pt;text-indent:5%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Risks and Uncertainties</p> <p style="margin-bottom:8pt;margin-top:0pt;margin-left:5%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The COVID-19 pandemic and its associated impacts on trade (including supply chains and export levels), travel, employee productivity and other economic activities have had, are currently having, and may for some time continue to have a destabilizing effect on financial markets and economic activity. The extent of the impact of COVID-19 on the Company’s operational and financial performance remains uncertain, cannot be predicted and will depend on certain developments, including, among others, the spread of COVID-19 and its variants, vaccination efforts, the duration of the pandemic, its impact on our customers, employees and vendors, and the continued governmental, regulatory and private sector responses, which may be precautionary, to COVID-19.</p> <p style="margin-bottom:8pt;margin-top:0pt;margin-left:5%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">The Company’s business, financial condition and results of operations generally rely upon the ability of the Company’s borrowers to repay their loans, the value of collateral underlying those loans, and demand for loans and other products and services that the Company offers, which are highly dependent on the business environment in the Company’s primary markets and the United States economy as a whole.</p> <p style="margin-bottom:8pt;margin-top:0pt;margin-left:5%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">In light of the changing economic outlook as a result of COVID-19, in March 2020, the Federal Reserve reduced the target federal funds rate by 150 basis points. These reductions in interest rates and other economic uncertainties that have arisen as a result primarily of the COVID-19 pandemic have negatively impacted net interest income, provisions for loan losses and noninterest income. Additional negative financial impacts could occur; however, the ultimate potential impact is not known at this time. </p>
CY2021	fusb	Number Of States NumberOfStates	12
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<p style="margin-bottom:0pt;margin-top:10pt;text-indent:5%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Use of Estimates</p> <p style="margin-bottom:0pt;margin-top:10pt;margin-left:5%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">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.</p> <p style="margin-bottom:0pt;margin-top:10pt;margin-left:5%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">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.</p> <p style="margin-bottom:0pt;margin-top:10pt;margin-left:5%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">A substantial portion of the Company’s loans are secured by real estate in its primary market areas. Accordingly, the ultimate collectability of a substantial portion of the Company’s loan portfolio and the recovery of a portion of the carrying amount of foreclosed real estate are susceptible to changes in economic conditions in the Company’s primary market areas.</p>
CY2021	fusb	Maximum Maturity Period For Cash Equivalents MaximumMaturityPeriodForCashEquivalents	P90D
CY2021	us-gaap	Interest Paid Net InterestPaidNet	3018000
CY2020	us-gaap	Interest Paid Net InterestPaidNet	4856000
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1375000
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	186000
CY2021	us-gaap	Mortgage Loans On Real Estate Foreclosures MortgageLoansOnRealEstateForeclosures	806000
CY2020	us-gaap	Mortgage Loans On Real Estate Foreclosures MortgageLoansOnRealEstateForeclosures	1388000
CY2021	fusb	Closed Branch Assets Transferred To Other Real Estate ClosedBranchAssetsTransferredToOtherRealEstate	1978000
CY2021	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	59000
CY2020	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	449000
CY2021	fusb	Number Of Investment Portfolios NumberOfInvestmentPortfolios	3
CY2021	fusb	Number Of Securities Held As Trading Securities NumberOfSecuritiesHeldAsTradingSecurities	0
CY2020	fusb	Number Of Securities Held As Trading Securities NumberOfSecuritiesHeldAsTradingSecurities	0
CY2021	us-gaap	Property Plant And Equipment Estimated Useful Lives PropertyPlantAndEquipmentEstimatedUsefulLives	three to forty years
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2021	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<p style="margin-bottom:0pt;margin-top:10pt;margin-left:5%;text-indent:0%;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-style:normal;text-transform:none;font-variant: normal;">Reclassification and Restatement</p> <p style="margin-bottom:0pt;margin-top:10pt;margin-left:5%;text-indent:0%;font-size:10pt;font-family:Times New Roman;font-weight:normal;font-style:normal;text-transform:none;font-variant: normal;">Certain disclosures in the notes to the prior period consolidated financial statements have been reclassified to conform to the 2021 presentation. These reclassifications had no effect on the Company’s results of operations, financial position or net cash flow.</p>
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6319357
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6281467
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	420250
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	421000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6739607
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6702467
CY2021	us-gaap	Net Income Loss NetIncomeLoss	4451000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	2707000
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.43
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.40
CY2021Q4	fusb	Number Of Full Time Employees NumberOfFullTimeEmployees	8
CY2020Q4	fusb	Number Of Full Time Employees NumberOfFullTimeEmployees	81
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	130676000
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
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
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	3477000
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	83289000
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1855000
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	151000
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	84993000
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6429000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	15041000
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	130000
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	6559000
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	81000
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	81000
CY2021Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	400000
CY2021Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	401000
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	34755000
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	34611000
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	74541000
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	74720000
CY2021Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	1783000
CY2021Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1811000
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	21299000
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	21471000
CY2021Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	1253000
CY2021Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	1265000
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	130676000
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 Fair Value HeldToMaturitySecuritiesFairValue	3477000
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
CY2021Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	0
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	3000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	4346000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	148000
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	412000
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
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	9
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	11
CY2021	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings	0
CY2020	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings	0
CY2021Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	52200000
CY2020Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	72900000
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	710944000
CY2021Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	2594000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	8320000
CY2021Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	700030000
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	650123000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7470000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	638374000
CY2021Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	66600000
CY2020Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	36100000
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	300000
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	400000
CY2021	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	0
CY2021	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	100000
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	650123000
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	710944000
CY2021Q4	fusb	Percentage Of Loans And Leases Past Due PercentageOfLoansAndLeasesPastDue	0.0055
CY2020	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	0
CY2020	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	500000
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	2131000
CY2021	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	971000
CY2021	fusb	Provision Reduction In Reserve For Loan Losses ProvisionReductionInReserveForLoanLosses	2010000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	8320000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	67000
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
CY2021Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	2598000
CY2021Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	708346000
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	710944000
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	5762000
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	2208000
CY2020	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	971000
CY2020	fusb	Provision Reduction In Reserve For Loan Losses ProvisionReductionInReserveForLoanLosses	2945000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7470000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	74000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	7396000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7470000
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	6951000
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	643012000
CY2021Q4	fusb	Percentage Of Loans And Leases Current PercentageOfLoansAndLeasesCurrent	0.9945
CY2021Q4	fusb	Percentage Of Loans And Leases PercentageOfLoansAndLeases	1.0000
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	650123000
CY2020Q4	fusb	Percentage Of Loans And Leases Past Due PercentageOfLoansAndLeasesPastDue	0.0082
CY2020Q4	fusb	Percentage Of Loans And Leases Current PercentageOfLoansAndLeasesCurrent	0.9918
CY2020Q4	fusb	Percentage Of Loans And Leases PercentageOfLoansAndLeases	1.0000
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	2008000
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3086000
CY2021Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	100000
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	100000
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
CY2021Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	2598000
CY2021Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	2598000
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	67000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	7009000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	7009000
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	102000
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	102000
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	74000
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	7111000
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	7111000
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	74000
CY2021	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3809000
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	51000
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	949000
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
CY2020	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	282000
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	1078000
CY2021	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	241000
CY2021	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	181000
CY2020	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3533000
CY2020	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	46000
CY2020	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	47000
CY2021Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	2000000.0
CY2020Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	3100000
CY2021	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	52000
CY2020	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	161000
CY2021Q4	fusb	Interest Income Recorded InterestIncomeRecorded	30000
CY2020Q4	fusb	Interest Income Recorded InterestIncomeRecorded	42000
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	2
CY2021Q4	fusb	Financing Receivable Restructuring Recorded Investment With Nonaccrual Status FinancingReceivableRestructuringRecordedInvestmentWithNonaccrualStatus	600000
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0
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
CY2020Q4	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
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	7
CY2021	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	903000
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	660000
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	5
CY2020	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
CY2021	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1981000
CY2020	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	293000
CY2021	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1205000
CY2020	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	413000
CY2021	fusb	Other Real Estate Gross Gains OtherRealEstateGrossGains	491000
CY2020	fusb	Other Real Estate Gross Gains OtherRealEstateGrossGains	48000
CY2020	fusb	Other Real Estate Gross Losses OtherRealEstateGrossLosses	47000
CY2021	fusb	Other Real Estate Net Income Loss OtherRealEstateNetIncomeLoss	491000
CY2020	fusb	Other Real Estate Net Income Loss OtherRealEstateNetIncomeLoss	1000
CY2021	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	67000
CY2020	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	10000
CY2021Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2149000
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	949000
CY2021Q4	fusb	Foreclosed Real Estate Owned Fair Value Less Disposal Costs ForeclosedRealEstateOwnedFairValueLessDisposalCosts	151000
CY2020Q4	fusb	Foreclosed Real Estate Owned Fair Value Less Disposal Costs ForeclosedRealEstateOwnedFairValueLessDisposalCosts	28000
CY2021Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	0
CY2021Q4	us-gaap	Goodwill Goodwill	7400000
CY2020Q4	us-gaap	Goodwill Goodwill	7400000
CY2021Q4	us-gaap	Goodwill Goodwill	7435000
CY2020Q4	us-gaap	Goodwill Goodwill	7435000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	2048000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	2048000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1414000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1073000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	634000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	975000
CY2021Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	8069000
CY2020Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	8410000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	268000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	195000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	122000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	49000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	634000
CY2021Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	16973000
CY2021Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	25213000
CY2021Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	6540000
CY2021Q4	us-gaap	Time Deposits TimeDeposits	213028000
CY2021Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	31000000.0
CY2020Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	23300000
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	47039000
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	51980000
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	21916000
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	23774000
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	25123000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	28206000
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1700000
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1700000
CY2021Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	135443000
CY2021Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	28859000
CY2021Q4	fusb	Brokered Certificates Of Deposit BrokeredCertificatesOfDeposit	32000000.0
CY2020Q4	fusb	Brokered Certificates Of Deposit BrokeredCertificatesOfDeposit	32000000.0
CY2021Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	4200000
CY2020Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	4300000
CY2021Q4	us-gaap	Federal Funds Purchased FederalFundsPurchased	0
CY2020Q4	us-gaap	Federal Funds Purchased FederalFundsPurchased	0
CY2021Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	46000
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	17000
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	10000000.0
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	0
CY2021Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	66600000
CY2020Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	36100000
CY2021Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	30000000.0
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	20000000.0
CY2021Q4	fusb	Federal Home Loan Bank Advances General Debt Obligations Disclosures Excess Of Collateral Available To Utilize Additional Credit FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresExcessOfCollateralAvailableToUtilizeAdditionalCredit	26600000
CY2020Q4	fusb	Federal Home Loan Bank Advances General Debt Obligations Disclosures Excess Of Collateral Available To Utilize Additional Credit FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresExcessOfCollateralAvailableToUtilizeAdditionalCredit	16100000
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1522000
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	29000
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-527000
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	626000
CY2021	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	995000
CY2020	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	655000
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	154000
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	76000
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	126000
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	94000
CY2021	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	280000
CY2020	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	170000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1275000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	825000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	2065000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	1749000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	947000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	973000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	243000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1202000
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	742000
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	88000
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	87000
CY2021	fusb	Income Tax Reconciliation Deductions Life Insurance Amount IncomeTaxReconciliationDeductionsLifeInsuranceAmount	62000
CY2020	fusb	Income Tax Reconciliation Deductions Life Insurance Amount IncomeTaxReconciliationDeductionsLifeInsuranceAmount	63000
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	169000
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	132000
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	54000
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	101000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1275000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	825000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	260000
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	192000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	42000
CY2021Q4	fusb	Deferred Tax Assets Unrealized Losses On Derivatives Designated As Cash Flow Hedges DeferredTaxAssetsUnrealizedLossesOnDerivativesDesignatedAsCashFlowHedges	144000
CY2020Q4	fusb	Deferred Tax Assets Unrealized Losses On Derivatives Designated As Cash Flow Hedges DeferredTaxAssetsUnrealizedLossesOnDerivativesDesignatedAsCashFlowHedges	443000
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	862000
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	667000
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	4261000
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	4326000
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1248000
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1311000
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	158000
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	245000
CY2021Q4	fusb	Deferred Tax Liabilities Partnerships DeferredTaxLiabilitiesPartnerships	87000
CY2020Q4	fusb	Deferred Tax Liabilities Partnerships DeferredTaxLiabilitiesPartnerships	138000
CY2021Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	52000
CY2020Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	426000
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	266000
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	231000
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1811000
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2351000
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2450000
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1975000
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2021	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	0
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	0
CY2021	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	1
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CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	500000
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	500000
CY2021	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.20
CY2021Q4	us-gaap	Defined Benefit Plan Number Of Shares Of Equity Securities Issued By Employer And Related Parties Included In Plan Assets DefinedBenefitPlanNumberOfSharesOfEquitySecuritiesIssuedByEmployerAndRelatedPartiesIncludedInPlanAssets	238514
CY2020Q4	us-gaap	Defined Benefit Plan Number Of Shares Of Equity Securities Issued By Employer And Related Parties Included In Plan Assets DefinedBenefitPlanNumberOfSharesOfEquitySecuritiesIssuedByEmployerAndRelatedPartiesIncludedInPlanAssets	214056
CY2021Q4	us-gaap	Deferred Compensation Arrangement With Individual Common Stock Reserved For Future Issuance DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance	117825
CY2020Q4	us-gaap	Deferred Compensation Arrangement With Individual Common Stock Reserved For Future Issuance DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance	111419
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0124
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.289
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0125
CY2020	fusb	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Fair Value Of Stock Option SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsFairValueOfStockOption	3.34
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
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	412800
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	9.72
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	10200
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	11.95
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
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 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
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	666
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	10.75
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	1334
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	9.70
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
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
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	359413
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	9.62
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	600000
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	200000
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	700000
CY2021	us-gaap	Dividends Common Stock DividendsCommonStock	700000
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.12
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.12
CY2021	fusb	Capital Conservation Buffer Rate CapitalConservationBufferRate	0.0250
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 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
CY2020Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	77510000
CY2020Q4	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.1178
CY2020Q4	fusb	Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0700
CY2020Q4	fusb	Common Equity Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Asset CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAsset	0.0650
CY2020Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	77510000
CY2020Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1178
CY2020Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0850
CY2020Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.0800
CY2020Q4	us-gaap	Capital Capital	84980000
CY2020Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1292
CY2020Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.1050
CY2020Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.1000
CY2020Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	77510000
CY2020Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0898
CY2020Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2020Q4	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	0.0500
CY2021	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.
CY2021Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2021	fusb	Lessee Operating Lease Period Of Option To Terminate LesseeOperatingLeasePeriodOfOptionToTerminate	P1Y
CY2021	us-gaap	Lease Cost LeaseCost	999000
CY2020	us-gaap	Lease Cost LeaseCost	841000
CY2021	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	830000
CY2020	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	842000
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2245000
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3070000
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	2317000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	3125000
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0329
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0306
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	859000
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	733000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	427000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	432000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	438000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	339000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	346000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	591000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2573000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	256000
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	2317000
CY2021	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	0
CY2020	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	0
CY2021	us-gaap	Derivative Instruments Income Statement Location Of Gain Or Loss Reclassified From Accumulated Oci DerivativeInstrumentsIncomeStatementLocationOfGainOrLossReclassifiedFromAccumulatedOCI	$(713)
CY2020	us-gaap	Derivative Instruments Income Statement Location Of Gain Or Loss Reclassified From Accumulated Oci DerivativeInstrumentsIncomeStatementLocationOfGainOrLossReclassifiedFromAccumulatedOCI	$(470)
CY2021Q4	us-gaap	Assets Under Management Carrying Amount AssetsUnderManagementCarryingAmount	39473000
CY2021Q4	us-gaap	Hedged Asset Fair Value Hedge Cumulative Increase Decrease HedgedAssetFairValueHedgeCumulativeIncreaseDecrease	-198000
CY2021Q4	fusb	Amortized Cost Basis Of Closed Portfolios Used In Hedging Relationships AmortizedCostBasisOfClosedPortfoliosUsedInHedgingRelationships	39300000
CY2021Q4	fusb	Cumulative Basis Adjustments Associated With Hedging Relationships CumulativeBasisAdjustmentsAssociatedWithHedgingRelationships	200000
CY2021Q4	us-gaap	Derivative Amount Of Hedged Item DerivativeAmountOfHedgedItem	20000000
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
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
CY2020	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	40377000
CY2020	us-gaap	Interest Expense InterestExpense	4611000
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	35766000
CY2020	fusb	Provision Reduction In Reserve For Loan Losses ProvisionReductionInReserveForLoanLosses	2945000
CY2020	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	32821000
CY2020	us-gaap	Noninterest Income NoninterestIncome	5010000
CY2020	us-gaap	Noninterest Expense NoninterestExpense	34299000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3532000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	825000
CY2020	us-gaap	Profit Loss ProfitLoss	2707000
CY2020Q4	us-gaap	Assets Assets	890511000
CY2021	us-gaap	Other Income OtherIncome	196000
CY2020	us-gaap	Other Income OtherIncome	247000
CY2021	us-gaap	Noninterest Income Other NoninterestIncomeOther	1577000
CY2020	us-gaap	Noninterest Income Other NoninterestIncomeOther	1974000
CY2021	fusb	Credit Insurance Income CreditInsuranceIncome	192000
CY2020	fusb	Credit Insurance Income CreditInsuranceIncome	309000
CY2020Q4	us-gaap	Marketable Securities MarketableSecurities	91422000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	638374000
CY2020Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	8410000
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	955000
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1684000
CY2020	fusb	Interest Income From External Customers InterestIncomeFromExternalCustomers	40377000
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	439000
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	433000
CY2021	fusb	Auto Club Revenue AutoClubRevenue	90000
CY2021	fusb	Other Income Atm Fees OtherIncomeATMFees	577000
CY2021	fusb	Wire Transfer Fees WireTransferFees	64000
CY2020	fusb	Wire Transfer Fees WireTransferFees	56000
CY2021	fusb	Gain On Sales Of Premises And Equipment And Other Assets GainOnSalesOfPremisesAndEquipmentAndOtherAssets	19000
CY2020	fusb	Gain On Sales Of Premises And Equipment And Other Assets GainOnSalesOfPremisesAndEquipmentAndOtherAssets	324000
CY2021	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	802000
CY2020	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	836000
CY2021	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	903000
CY2020	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	908000
CY2021	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	167000
CY2020	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	175000
CY2021	fusb	Business Development And Travel BusinessDevelopmentAndTravel	147000
CY2020	fusb	Business Development And Travel BusinessDevelopmentAndTravel	226000
CY2021	fusb	Collection And Recoveries CollectionAndRecoveries	168000
CY2020	fusb	Collection And Recoveries CollectionAndRecoveries	218000
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	322000
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	325000
CY2021	fusb	Loss On Sales Of Premises And Equipment And Other Assets LossOnSalesOfPremisesAndEquipmentAndOtherAssets	150000
CY2020	fusb	Loss On Sales Of Premises And Equipment And Other Assets LossOnSalesOfPremisesAndEquipmentAndOtherAssets	466000
CY2021	fusb	Foreclosed Real Estate Other Expense Net Of Gain Or Loss On Sale ForeclosedRealEstateOtherExpenseNetOfGainOrLossOnSale	-371000
CY2020	fusb	Foreclosed Real Estate Other Expense Net Of Gain Or Loss On Sale ForeclosedRealEstateOtherExpenseNetOfGainOrLossOnSale	64000
CY2021	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2114000
CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1811000
CY2021Q4	us-gaap	Self Insurance Reserve SelfInsuranceReserve	200000
CY2020Q4	us-gaap	Self Insurance Reserve SelfInsuranceReserve	200000
CY2021	us-gaap	Operating Expenses OperatingExpenses	6104000
CY2020	us-gaap	Operating Expenses OperatingExpenses	6485000
CY2021Q4	fusb	Securities Committed To Sell Amount SecuritiesCommittedToSellAmount	0
CY2020Q4	fusb	Securities Committed To Sell Amount SecuritiesCommittedToSellAmount	0
CY2021	fusb	Credit Losses Associated With Derivative Contracts CreditLossesAssociatedWithDerivativeContracts	0
CY2020	fusb	Credit Losses Associated With Derivative Contracts CreditLossesAssociatedWithDerivativeContracts	0
CY2021Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9987000
CY2021Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10030000
CY2020Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10204000
CY2020Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	1046000
CY2021Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10059000
CY2021Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9845000
CY2020Q2	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	850000
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
CY2020Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9292000
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8965000
CY2020Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8623000
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	8886000
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
CY2020Q4	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	469000
CY2020Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9996000
CY2020Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	9780000
CY2020Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	10397000
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
CY2020Q4	us-gaap	Interest Expense InterestExpense	912000
CY2020Q3	us-gaap	Interest Expense InterestExpense	1031000
CY2020Q2	us-gaap	Interest Expense InterestExpense	1157000
CY2020Q1	us-gaap	Interest Expense InterestExpense	1511000
CY2020Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	580000
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
CY2020Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8823000
CY2020Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7919000
CY2020Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	7773000
CY2020Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	8306000
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
CY2020Q4	us-gaap	Noninterest Income NoninterestIncome	1008000
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	1375000
CY2020Q2	us-gaap	Noninterest Income NoninterestIncome	1330000
CY2020Q1	us-gaap	Noninterest Income NoninterestIncome	1297000
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
CY2020Q4	us-gaap	Noninterest Expense NoninterestExpense	8477000
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	8747000
CY2020Q2	us-gaap	Noninterest Expense NoninterestExpense	8581000
CY2020Q1	us-gaap	Noninterest Expense NoninterestExpense	8494000
CY2021Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2218000
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1066000
CY2021Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1224000
CY2021Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1218000
CY2020Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1354000
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	547000
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	522000
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1109000
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
CY2020Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	309000
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	136000
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	118000
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	262000
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
CY2020Q4	us-gaap	Profit Loss ProfitLoss	1045000
CY2020Q3	us-gaap	Profit Loss ProfitLoss	411000
CY2020Q2	us-gaap	Profit Loss ProfitLoss	404000
CY2020Q1	us-gaap	Profit Loss ProfitLoss	847000
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
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.13
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
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.15
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.13

Files In Submission

Name	View Source	Status
0001564590-22-010052-index-headers.html	Edgar Link	pending
0001564590-22-010052-index.html	Edgar Link	pending
0001564590-22-010052.txt	Edgar Link	pending
0001564590-22-010052-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
fusb-10k_20211231.htm	Edgar Link	pending
fusb-10k_20211231_htm.xml	Edgar Link	completed
fusb-20211231.xsd	Edgar Link	pending
fusb-20211231_cal.xml	Edgar Link	unprocessable
fusb-20211231_def.xml	Edgar Link	unprocessable
fusb-20211231_lab.xml	Edgar Link	unprocessable
fusb-20211231_pre.xml	Edgar Link	unprocessable
fusb-ex21_6.htm	Edgar Link	pending
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$FUSB
FIRST US BANCSHARES, INC. Stock $fusb

2021 Q4 Form 10-K Financial Statement

#000156459022010052 Filed on March 14, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FUSB FIRST US BANCSHARES, INC. Stock $fusb

2021 Q4 Form 10-K Financial Statement

#000156459022010052 Filed on March 14, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FUSB
FIRST US BANCSHARES, INC. Stock $fusb