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Note 13 - Fair Value and Interest Rate Risk - Quantitative Information About Level 3 Fair Value Measurements (Details)	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
SBA servicing assets	$ 706,000	$ 584,000
Fair Value, Inputs, Level 3 [Member]
SBA servicing assets	773,000	$ 617,000
Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Measurement Input, Discount Rate [Member]
SBA servicing assets		0.1473
Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Measurement Input, Discount Rate [Member]
SBA servicing assets		0.1490
Fair Value, Inputs, Level 3 [Member] | Fair Value of Collateral Approach [Member]
Impaired loans, net	$ 13,293,000	$ 20,920,000
Fair Value, Inputs, Level 3 [Member] | Fair Value of Collateral Approach [Member] | Minimum [Member] | Measurement Input, Discount Rate [Member]
Impaired loans, net	0.058	0.058
Fair Value, Inputs, Level 3 [Member] | Fair Value of Collateral Approach [Member] | Maximum [Member] | Measurement Input, Discount Rate [Member]
Impaired loans, net	0.20	0.20
Fair Value, Inputs, Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Minimum [Member] | Measurement Input, Discount Rate [Member]
SBA servicing assets	0.1473
Fair Value, Inputs, Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Maximum [Member] | Measurement Input, Discount Rate [Member]
SBA servicing assets	0.1490

X

- Definition

Fair value portion of impaired loans receivable.

+ References

No definition available.

+ Details

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Namespace Prefix:	pnbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Value of input used to measure impaired loans.

+ References

No definition available.

+ Details

Name:	pnbk_ImpairedLoansMeasurementInput
Namespace Prefix:	pnbk_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

+ Details

Name:	us-gaap_ServicingAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Value of input used to measure servicing asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

+ Details

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Balance Type:	na
Period Type:	instant

X

- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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- Details

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- Details

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- Details

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Namespace Prefix:
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- Details

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