Current outstanding recorded investment, after troubled debt restructuring, of modified financing receivable.

No definition available.

Name:	pmhg_FinancingReceivableTroubledDebtRestructuringCurrentModificationOutstandingRecordedInvestment
Namespace Prefix:	pmhg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

+ Details

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

- Definition

Amount, before troubled debt restructuring, of financing receivable to be modified.

+ References

+ Details

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

- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=pmhg_RealEstateConstructionLoanMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
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Note 3 - Loans - Summary of Loans Determined to Be Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Number of Contracts	0	1	0	3
Modified Principal [Member]
Number of Contracts		1		3
Pre-Modification Outstanding Recorded Investment		$ 204		$ 330
Post-Modification Outstanding Recorded Investment		204		330
Current Modification Outstanding Recorded Investment		$ 204		$ 330
Commercial Real Estate Portfolio Segment [Member] \| Modified Principal [Member]
Number of Contracts		1		2
Pre-Modification Outstanding Recorded Investment		$ 204		$ 264
Post-Modification Outstanding Recorded Investment		204		264
Current Modification Outstanding Recorded Investment		$ 204		$ 264
Real Estate Construction Loan [Member] \| Modified Principal [Member]
Number of Contracts
Pre-Modification Outstanding Recorded Investment
Post-Modification Outstanding Recorded Investment
Current Modification Outstanding Recorded Investment
Residential Portfolio Segment [Member] \| Modified Principal [Member]
Number of Contracts				1
Pre-Modification Outstanding Recorded Investment				$ 66
Post-Modification Outstanding Recorded Investment				66
Current Modification Outstanding Recorded Investment				$ 66