Document And Entity Information Statistical Measurement [Axis] Note To Financial Statement Details Textual Document Fiscal Period Focus EBP, Basis of Accounting [Policy Text Block] EBP, Note Receivable from Participant [Policy Text Block] Significant Accounting Policies Document Fiscal Year Focus Note 1 - Description of Plan Note 4 - Fair Value Measurements Note 6 - Related Party and Party-In-Interest Transactions Amendment Flag Schedule H, Line 4i Note 1 - Description of Plan - Schedule of Vesting (Details) Note 4 - Fair Value Measurements - Schedule of Assets at Fair Value (Details) us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentPartyInInterest EBP, Asset Held for Investment, Party-in-Interest [true false] Note 6 - Related Party and Party-In-Interest Transactions (Details) Schedule H, Line 4i - Schedule of Assets (Held at End of Year) 2 (Details) Minimum [Member] Schedule H, Line 4i - Schedule of Assets (Held at End of Year) 2 2 (Details) Notes To Financial Statements dei_DocumentPeriodEndDate Document Period End Date Statistical Measurement [Domain] Notes To Financial Statements [Abstract] us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution EBP, Change in Net Asset Available for Benefit, Increase from Contribution Maximum [Member] plbc_EBPContributionVestingPercentage EBP, Contribution Vesting Percentage Represents the vesting percentage for contributions to an employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). plbc_EBPParticipantContributionAutomaticDeferralRateAutomaticYearlyIncrease EBP, Participant Contribution, Automatic, Deferral Rate, Automatic Yearly Increase Percentage of yearly increase in eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Legal Entity [Axis] plbc_EBPMinimumTimeOfServiceOfParticipants EBP, Minimum Time of Service of Participants (Month) The minimum time of service of participants in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). EBP 95-3520374 001 [Member] Relating to EBP 95-3520374 001. EBP, Schedule of Asset Held for Investment [Table] plbc_EBPMinimumAgeOfParticipants EBP, Minimum Age of Participants The minimum age of participants in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). us-gaap-ebp_EmployeeBenefitPlanParticipantLoanMaturityDate EBP, Asset Held for Investment, Participant Loan, Maturity Date Greater Than 5 Years [Member] Relating to greater than 5 years. plbc_EBPNoteReceivableFromParticipantTerm EBP, Note Receivable from Participant, Term (Year) Period for term on note receivable from participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Notes receivable from participants Greater Than 3 Years But Less Than 4 Years [Member] Relating to greater than 3 years but less than 4 years of service. dei_EntityTaxIdentificationNumber Entity Tax Identification Number Greater Than 4 Years But Less Than 5 Years [Member] Relating to greater than 4 years but less than 5 years of service. Less than 2 Years [Member] Relating to less than 2 years of service. EBP, Investment, Fair Value and NAV [Text Block] Entity [Domain] Interest income on notes receivable from participants Greater Than 2 Years But Less Than 3 Years [Member] Relating to greater than 2 years but less than 3 years of service. Entity Central Index Key Net appreciation in fair value of investments EBP, Schedule of Vesting [Table Text Block] The tabular disclosure of vesting in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). dei_EntityRegistrantName Entity Registrant Name Vesting Percentage Represents the vesting percentage of employer contributions in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Entity Current Reporting Status EBP, Description of Plan [Text Block] EBP, Asset Held for Investment EBP, Related Party and Party-in-Interest Transactions [Table] plbc_EBPTerminationIRARolloverThreshold EBP, Termination, IRA Rollover Threshold Represents the IRA rollover threshold for an employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Current Fiscal Year End Date us-gaap-ebp_EmployeeBenefitPlanTaxDeterminationLetterDate EBP, Tax Determination Letter, Date plbc_EBPTerminationVestedSingleSumCashOut EBP, Termination, Vested, Single Sum Cash Out Represents the amount of vested balance that will be paid in a single sum. EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution EBP, Related Party and Party-in-Interest Transactions [Table Text Block] us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease Total additions plbc_EBPInvestmentCreditingRate EBP, Investment, Crediting Rate Represents the crediting rate on an investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, insurance contract meeting fully benefit-responsive investment criteria. plbc_EBPInvestmentEmployerInitiatedTransferThresholdPercentage EBP, Investment, Employer Initiated Transfer Threshold Percentage The threshold percentage of employer initiated transfer on an investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, insurance contract meeting fully benefit-responsive investment criteria. Entity Shell Company plbc_EBPInvestmentEmployerInitiatedTransferSurrenderChargePercentage EBP, Investment, Employer Initiated Transfer, Surrender Charge Percentage The surrender charge percentage of an employer initiated transfer on an investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, insurance contract meeting fully benefit-responsive investment criteria. Entity Emerging Growth Company Entity Small Business plbc_EBPInvestmentTerminationFeePercentage EBP, Investment, Termination Fee Percentage Represents the termination fee percentage of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, insurance contract meeting fully benefit-responsive investment criteria. Schedule of Assets [Text Block] The entire disclosure for schedule of assets. Investments [Domain] EBP, Employer, Common Stock [Member] Benefits paid to participants Plumas Bancorp [Member] Relating to Plumas Bancorp. Accounting Policies [Abstract] Rollover Employer EBP, Risk and Uncertainty [Table] us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment Net investment income Investments at contract value (Note 3) Valuation Approach and Technique [Domain] us-gaap-ebp_EmployeeBenefitPlanTaxQualificationStatusExtensibleEnumeration EBP, Tax Qualification Status [Extensible Enumeration] Valuation, Market Approach [Member] us-gaap-ebp_EbpPlanName EBP, Plan Name Statement of Stockholders' Equity [Abstract] plbc_EmployeeBenefitPlanParticipantLoanInterestRateBasisSpread Employee Benefit Plan, Participant Loan Interest Rate Basis Spread Represents the interest rate basis spread on a participant loan as part of an employee benefit program. EBP, Tax Status [Text Block] us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccountDecreaseForAdministrativeExpense EBP, Forfeited Nonvested Account, Decrease from Administrative Expense us-gaap-ebp_EmployeeBenefitPlanInvestmentFairAndContractValue Total Investments us-gaap-ebp_EmployeeBenefitPlanInvestmentValuationTechniqueExtensibleEnumeration EBP, Investment, Valuation Technique [Extensible Enumeration] Investment value EBP, Risk and Uncertainty [Policy Text Block] Equity Components [Axis] Investments at fair value (Note 4) Class of Stock [Axis] Equity Component [Domain] Fair Value, Inputs, Level 2 [Member] EBP, Contingency [Text Block] Fair Value, Inputs, Level 3 [Member] us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForDividendIncomeOnInvestment EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Fair Value, Inputs, Level 1 [Member] EBP, Subsequent Event [Table] us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease Net increase DEDUCTIONS us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate EBP, Asset Held for Investment, Participant Loan, Interest Rate us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccountDecreaseForEmployerContribution EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Contributions: Scenario [Axis] Scenario [Domain] Investment income: Interest and dividends Deferred Fixed Annuity [Member] EBP, Contingency [Table] Total investments at fair value Fair value, based on quoted market values EBP, Investment, Contract Value us-gaap-ebp_EbpRiskAndUncertaintyConcentrationOfInvestmentAtFairValueToNetAssetsPercentage EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Net Assets, Percentage Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Investments: Investment, Identifier [Axis] EBP, Accounting Policy [Table] EBP, Description of Plan [Table] Statement [Table] EBP, Tax Status [Table] Fair Value Hierarchy and NAV [Domain] us-gaap-ebp_EmployeeBenefitPlanPlanNumber EBP, Plan Number EBP, Risk and Uncertainty [Text Block] Statement of Financial Position [Abstract] us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractLimitationOnTransactingAtContractValueNotProbable EBP, Fully Benefit-Responsive Investment Contract, Limitation on Transacting at Contract Value, Not Probable [true false] us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractDescription EBP, Fully Benefit-Responsive Investment Contract, Description EBP, Traditional Guaranteed Investment Contract [Member] EBP, Fully Benefit-Responsive Investment Contract [Text Block] Investment type us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate EBP, Participant Contribution, Automatic, Deferral Rate Investment Type [Axis] us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage EBP, Employer Contribution, Matching Percentage Mutual Fund [Member] Number of shares (in shares) EBP, Schedule of Asset Held for Investment [Text Block] EBP, Use of Estimate [Policy Text Block] EBP, Subsequent Event [Text Block] us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount EBP, Related Party and Party-in-Interest [Domain] dei_DocumentType Document Type EBP, Summary of Accounting Policy [Text Block] Notes Receivable from Participants Document Information [Line Items] EBP, Investment [Policy Text Block] Document Information [Table] us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForUnrealizedGainLossOnInvestment EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Unrealized Gain (Loss) on Investment Entity Interactive Data Current Statement [Line Items] Fair Value Hierarchy and NAV [Axis] EBP, Related Party and Party-in-Interest [Axis] EBP, Payment to Participant [Policy Text Block] us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage EBP, Employer Contribution, Participant Compensation Matched, Percentage us-gaap-ebp_EmployeeBenefitPlanTaxDeterminationLetterObtained EBP, Tax Determination Letter, Obtained [true false] EBP, Management [Member] us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease Total deductions Money Market Funds [Member] EBP, Related Party and Party-in-Interest Transactions [Text Block] ASSETS us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit Net assets available for benefits Beginning of year End of year EBP, Fully Benefit-Responsive Investment Contract [Table] plbc_PolicyTable EBP, Investment, Fair Value and NAV [Table Text Block] us-gaap_PolicyTextBlockAbstract Accounting Policies Participant EBP, Investment, Fair Value and NAV [Table] us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements Retirement Plan Tax Status [Domain] us-gaap_TableTextBlock Notes Tables Qualified Plan [Member]