Annnual Base Salary

No definition available.

Name:	pnbk_AnnnualBaseSalary
Namespace Prefix:	pnbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Annual Bonus, Eligible As Equity Awards

+ References

No definition available.

+ Details

Name:	pnbk_AnnualBonusEligibleAsEquityAwards
Namespace Prefix:	pnbk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Banking Regulation, Collateral Required, Actual

+ References

No definition available.

+ Details

Name:	pnbk_BankingRegulationCollateralRequiredActual
Namespace Prefix:	pnbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Banking Regulation, Collateral Required, Minimum

+ References

No definition available.

+ Details

Name:	pnbk_BankingRegulationCollateralRequiredMinimum
Namespace Prefix:	pnbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Collateral Pledge Percentage

+ References

No definition available.

+ Details

Name:	pnbk_CollateralPledgePercentage
Namespace Prefix:	pnbk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Initial Equity Award, Restricted Units Issued

+ References

No definition available.

+ Details

Name:	pnbk_InitialEquityAwardRestrictedUnitsIssued
Namespace Prefix:	pnbk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Co Lead Investors

+ References

No definition available.

+ Details

Name:	pnbk_NumberOfCoLeadInvestors
Namespace Prefix:	pnbk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Outstanding Common Stock Share Limit

+ References

No definition available.

+ Details

Name:	pnbk_OutstandingCommonStockShareLimit
Namespace Prefix:	pnbk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Restricted Stock Units Award Effective Date

+ References

No definition available.

+ Details

Name:	pnbk_RestrictedStockUnitsAwardEffectiveDate
Namespace Prefix:	pnbk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Restricted Stock Units Award End Of Quarter

+ References

No definition available.

+ Details

Name:	pnbk_RestrictedStockUnitsAwardEndOfQuarter
Namespace Prefix:	pnbk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Restricted Stock Units Award, Percentage of Outstanding Common Stock Eligible For Conversion

+ References

No definition available.

+ Details

Name:	pnbk_RestrictedStockUnitsAwardPercentageOfOutstandingCommonStockEligibleForConversion
Namespace Prefix:	pnbk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Restricted Stock Units, Number Of Equal Monthly Tranches

+ References

No definition available.

+ Details

Name:	pnbk_RestrictedStockUnitsNumberOfEqualMonthlyTranches
Namespace Prefix:	pnbk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Restricted Stock Units, Restricted Period Business Days

+ References

No definition available.

+ Details

Name:	pnbk_RestrictedStockUnitsRestrictedPeriodBusinessDays
Namespace Prefix:	pnbk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Restricted Stock Units, Restriction Period From The Grant Date

+ References

No definition available.

+ Details

Name:	pnbk_RestrictedStockUnitsRestrictionPeriodFromTheGrantDate
Namespace Prefix:	pnbk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Sale of Stock, Consideration Received on Transaction Shares

+ References

No definition available.

+ Details

Name:	pnbk_SaleOfStockConsiderationReceivedOnTransactionShares
Namespace Prefix:	pnbk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Stock, Options Or Rights Allowable To Be Granted Of Outstanding Shares, Percentage

+ References

No definition available.

+ Details

Name:	pnbk_StockOptionsOrRightsAllowableToBeGrantedOfOutstandingSharesPercentage
Namespace Prefix:	pnbk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face amount or stated value per share of common stock.

+ References

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-4

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-3

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-5

+ Details

Name:	us-gaap_ConversionOfStockSharesIssued1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-3

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-5

+ Details

Name:	us-gaap_DebtConversionConvertedInstrumentAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.12-12A(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12(Column A)(Footnote 4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-3

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-6

+ Details

Name:	us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-4

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

+ Details

Name:	us-gaap_PreferredStockLiquidationPreference
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Face amount per share of no-par value preferred stock nonredeemable or redeemable solely at the option of the issuer.

+ References

+ Details

Name:	us-gaap_PreferredStockNoParValue
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References

+ Details

Name:	us-gaap_PreferredStockSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=pnbk_CashDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=pnbk_TreasuryAndAgencySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=pnbk_OtherSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=pnbk_LoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=pnbk_A2025OmnibusEquityIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=pnbk_ExecutiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_PrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_PreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=pnbk_A6.25SubordinatedNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=pnbk_A8.5SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=pnbk_A6.25FixedToFloatingSubordinatedNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=pnbk_SeniorNotesDue2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Event - Narrative (Details)	Oct. 01, 2026	May 20, 2025 investor	Mar. 31, 2025 USD ($) $ / shares	Mar. 20, 2025 USD ($) tranche shares	Feb. 11, 2025 USD ($)	Jan. 01, 2026	Mar. 13, 2025 shares	Feb. 14, 2025	Dec. 31, 2024 $ / shares shares	Dec. 31, 2023 $ / shares shares
Subsequent Event [Line Items]
Common stock, par value (usd per share) \| $ / shares									$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares) \| shares									1,000,000	1,000,000
Forecast
Subsequent Event [Line Items]
Debt instrument, interest rate, stated						10.00%
Series A Preferred Stock \| Forecast
Subsequent Event [Line Items]
Dividend rate percentage	10.00%
Subsequent Event
Subsequent Event [Line Items]
Number of colead investors \| investor		3
Payment system risk collateral requirement amount \| $					$ 24,400,000
Payment system risk collateral requirement holded by bank \| $					$ 69,900,000
Subsequent Event \| Cash Deposit
Subsequent Event [Line Items]
Collateral pledge percentage					0.00%
Subsequent Event \| Treasury And Agency Securities
Subsequent Event [Line Items]
Collateral pledge percentage					10.00%
Subsequent Event \| Other Securities
Subsequent Event [Line Items]
Collateral pledge percentage					5.00%
Subsequent Event \| Loans
Subsequent Event [Line Items]
Collateral pledge percentage					15.00%
Subsequent Event \| 2025 Omnibus Equity Incentive Plan \| Executive
Subsequent Event [Line Items]
Stock appreciation rights percentage				20.00%
Outstanding common stock share limit (in shares) \| shares				10,000,000
Employment period				3 years
Annual base salary payable \| $				$ 200,000
Annual bonus limit of compensation, percentage				50.00%
Equity award effective date				30 days
Equity award end of quarter				30 days
Restricted stock units issue percentage				5.00%
Restricted stock units award, percentage of outstanding common stock eligible for conversion				5.00%
Number of equal monthly tranches \| tranche				12
Restriction period				1 year
Restricted period business days				10 days
Subsequent Event \| Private Placement
Subsequent Event [Line Items]
Consideration received on transaction \| $			$ 57,750,000
Subsequent Event \| Common Stock
Subsequent Event [Line Items]
Number of shares issued (in shares) \| shares				7,266,560
Subsequent Event \| Common Stock \| Private Placement
Subsequent Event [Line Items]
Common stock, par value (usd per share) \| $ / shares			$ 0.01
Sale of stock price (usd per share) \| $ / shares			0.75
Number of shares issued (in shares) \| shares				60,400,106
Subsequent Event \| Preferred Stock \| Private Placement
Subsequent Event [Line Items]
Preferred stock, no par value (usd per share) \| $ / shares			0
Liquidation preference per share (usd per share) \| $ / shares			$ 60
Subsequent Event \| Series A Preferred Stock
Subsequent Event [Line Items]
Preferred stock, shares authorized (in shares) \| shares							500,000
Subsequent Event \| Series A Preferred Stock \| Private Placement
Subsequent Event [Line Items]
Number of shares issued (in shares) \| shares				90,832
Subsequent Event \| 6.25% Subordinated Notes
Subsequent Event [Line Items]
Debt instrument, interest rate, stated				6.25%
Subsequent Event \| 8.5% Senior Notes
Subsequent Event [Line Items]
Debt instrument, interest rate, stated				8.50%				8.50%
Consideration received on transaction \| $				$ 7,000,000.0
Convertible shares received (in shares) \| shares				9,333,334
Subsequent Event \| 6.25% Fixed to Floating Subordinated Note
Subsequent Event [Line Items]
Outstanding principal amount \| $			$ 2,000,000.0
Subsequent Event \| Senior Notes Due 2026
Subsequent Event [Line Items]
Outstanding principal amount \| $				$ 5,000,000.0