Amount of Additional borrowing capacity of related party promissory note.

No definition available.

Name:	pmgmu_AdditionalBorrowingCapacityOfRelatedPartyPromissoryNote
Namespace Prefix:	pmgmu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The outflow of cash made during the period as a deposit into operating account.

+ References

No definition available.

+ Details

Name:	pmgmu_AmountOfFundsDepositedIntoOperatingAccount
Namespace Prefix:	pmgmu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Price per share or per unit of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	pmgmu_ClassOfWarrantOrRightPriceOfWarrantsOrRights
Namespace Prefix:	pmgmu_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of maximum borrowing capacity of related party promissory note.

+ References

No definition available.

+ Details

Name:	pmgmu_MaximumBorrowingCapacityOfRelatedPartyPromissoryNote
Namespace Prefix:	pmgmu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Working capital loans outstanding which were converted into working capital warrants.

+ References

No definition available.

+ Details

Name:	pmgmu_MaximumLoanConvertibleIntoWarrants
Namespace Prefix:	pmgmu_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum amount which a potential loan could have repaid through issuance of warrants.

+ References

No definition available.

+ Details

Name:	pmgmu_MaximumLoansConvertibleIntoWarrants
Namespace Prefix:	pmgmu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The contractual monthly amount to be paid for support services.

+ References

No definition available.

+ Details

Name:	pmgmu_RelatedPartyTransactionExpensesFromTransactionsWithRelatedPartyPerMonth
Namespace Prefix:	pmgmu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the amount of working capital loan.

+ References

No definition available.

+ Details

Name:	pmgmu_WorkingCapitalLoans
Namespace Prefix:	pmgmu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount for notes payable (written promise to pay), due to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(a)(5))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(1))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Name:	us-gaap_NotesPayableRelatedPartiesClassifiedCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount for notes payable (written promise to pay), due to related parties.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.17)
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(1))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Name:	us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=pmgmu_SponsorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=pmgmu_PromissoryNoteWithRelatedPartyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=pmgmu_WorkingCapitalLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=pmgmu_AdministrativeServiceFeeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=pmgmu_CeoAndCfoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

RELATED PARTY TRANSACTIONS - Additional Information (Details) - USD ($)					12 Months Ended
	Nov. 28, 2022	Feb. 08, 2021	Jan. 13, 2021	Dec. 17, 2020	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Feb. 11, 2021
RELATED PARTY TRANSACTIONS
Maximum borrowing capacity of related party promissory note					$ 300,000	$ 266,964
Promissory note - related party					150,000	0
Sponsor
RELATED PARTY TRANSACTIONS
Promissory note - related party								$ 73,295
Promissory Note with Related Party
RELATED PARTY TRANSACTIONS
Maximum borrowing capacity of related party promissory note				$ 75,000
Additional borrowing capacity of related party promissory note			$ 50,000
Outstanding balance of related party note					0	0
Promissory Note with Related Party \| Sponsor
RELATED PARTY TRANSACTIONS
Maximum borrowing capacity of related party promissory note	$ 150,000
Deposit into operating account					$ 150,000
Working Capital Loans
RELATED PARTY TRANSACTIONS
Price of warrant					$ 1.50
Working capital loans					$ 0	$ 0
Maximum loans convertible into warrants					1,500,000
Working Capital Loans \| Working Capital Warrants
RELATED PARTY TRANSACTIONS
Loan conversion agreement warrant							66,667
Working capital loans							$ 100,000
Administrative Service Fee
RELATED PARTY TRANSACTIONS
Expenses per month		$ 25,000
Administrative Service Fee \| Sponsor
RELATED PARTY TRANSACTIONS
Expenses per month					$ 10,000
Administrative Service Fee \| CEO and CFO
RELATED PARTY TRANSACTIONS
Expenses per month		$ 15,000