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Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans (Non-Accrual and Past Due Loans [Member], USD $) | Mar. 31, 2015 | Dec. 31, 2014
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Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues | $ 380,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue | $ 728,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue
Non-Accrual Loans, Current | 135,000 us-gaap_FinancingReceivableRecordedInvestmentCurrent | 138,000 us-gaap_FinancingReceivableRecordedInvestmentCurrent
Total Non Accrual Loans | 515,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus | 866,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non-Accrual Loans, Current | 135,000 us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 138,000 us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Total Non Accrual Loans | 135,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 138,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Commercial Real Estate Portfolio Segment [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non-Accrual Loans, Current | 135,000 us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember | 138,000 us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember
Total Non Accrual Loans | 135,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember | 138,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember
Residential Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues | 380,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_FinancingReceivablesPeriodPastDueAxis = us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 719,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_FinancingReceivablesPeriodPastDueAxis = us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Residential Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues | 380,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_FinancingReceivablesPeriodPastDueAxis = us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember | 719,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_FinancingReceivablesPeriodPastDueAxis = us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Residential Portfolio Segment [Member] | Substandard [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues | 380,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 719,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Total Non Accrual Loans | 380,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 719,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Residential Portfolio Segment [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues | 380,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ResidentialPortfolioSegmentMember | 719,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ResidentialPortfolioSegmentMember
Total Non Accrual Loans | 380,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ResidentialPortfolioSegmentMember | 719,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ResidentialPortfolioSegmentMember
Commercial Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues |  | 2,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivablesPeriodPastDueAxis = us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Commercial Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues |  | 2,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivablesPeriodPastDueAxis = us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Commercial Portfolio Segment [Member] | Substandard [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues |  | 2,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Total Non Accrual Loans |  | 2,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Commercial Portfolio Segment [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues |  | 2,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialPortfolioSegmentMember
Total Non Accrual Loans |  | 2,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_CommercialPortfolioSegmentMember
Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Substandard [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues |  | 7,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ConsumerPortfolioSegmentMember / us-gaap_FinancingReceivablesPeriodPastDueAxis = us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues |  | 7,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ConsumerPortfolioSegmentMember / us-gaap_FinancingReceivablesPeriodPastDueAxis = us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Consumer Portfolio Segment [Member] | Substandard [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues |  | 7,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ConsumerPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Total Non Accrual Loans |  | 7,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ConsumerPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Consumer Portfolio Segment [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues |  | 7,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ConsumerPortfolioSegmentMember
Total Non Accrual Loans |  | 7,000 pnbk_FinancingReceivableRecordedInvestmentPastDuesAndNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablePortfolioSegmentAxis = us-gaap_ConsumerPortfolioSegmentMember
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) - Delinquency Status of Non-Accrual Loans and Past Due Matured Loans [Line Items] |  |
Non Accrual Loans- Past dues | $ 380,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablesPeriodPastDueAxis = us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember | $ 728,000 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = pnbk_NonAccrualAndPastDueLoansMember / us-gaap_FinancingReceivablesPeriodPastDueAxis = us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember

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- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953401-111524 + Details
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