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

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.

+ 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

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

+ Details

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

- 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

- Definition

The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

+ Details

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

- Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=pmgmu_SponsorMember
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 ($)					1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Nov. 28, 2022	Feb. 08, 2021	Jan. 13, 2021	Dec. 17, 2020	Dec. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Apr. 27, 2023	Jun. 30, 2021
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
Repayment of promissory note - related party								$ 0		$ 0
Promissory Note with Related Party \| Sponsor
RELATED PARTY TRANSACTIONS
Maximum borrowing capacity of related party promissory note	$ 150,000							1,000,000
Deposit into operating account					$ 150,000
Outstanding balance of related party note					150,000	$ 0		0		150,000	$ 1,000,000
Outstanding borrowings					150,000	0		0		150,000	$ 1,000,000
Working Capital Loans
RELATED PARTY TRANSACTIONS
Maximum loans convertible into warrants						$ 1,500,000		$ 1,500,000
Price of warrant						$ 1.50		$ 1.50
Working capital loans					$ 0	$ 0		$ 0		$ 0
Working Capital Loans \| Working Capital Warrants
RELATED PARTY TRANSACTIONS
Maximum loans convertible into warrants												$ 66,667
Working capital loans												$ 100,000
Administrative Service Fee
RELATED PARTY TRANSACTIONS
Expenses per month		$ 25,000
Expenses incurred and paid						$ 75,000	$ 75,000	$ 150,000	$ 150,000
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