v3.25.4

Cover	Mar. 02, 2026
Document Information Line Items
Entity Registrant Name	Piermont Valley Acquisition Corp
Entity Central Index Key	0001865248
Document Type	8-K
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Emerging Growth Company	true
Document Period End Date	Mar. 02, 2026
Entity Ex Transition Period	false
Entity File Number	001-41108
Entity Incorporation State Country Code	E9
Entity Tax Identification Number	98-1598114
Entity Address Address Line 1	732 S 6th St.
Entity Address Address Line 2	#5386
Entity Address City Or Town	Las Vegas
Entity Address State Or Province	NV
Entity Address Postal Zip Code	89101
City Area Code	929
Written Communications	false
Soliciting Material	false
Pre Commencement Tender Offer	false
Pre Commencement Issuer Tender Offer	false
Local Phone Number	792-5788
Units, each consisting of one Class A ordinary share, par value $0.0001, and one-half of one redeemable warrant [Member]
Document Information Line Items
Security 12b Title	Units, each consisting of one Class A ordinary share, par value $0.0001, and one-half of one redeemable warrant
Trading Symbol	CMCAU
Class A ordinary shares, par value [Member]
Document Information Line Items
Security 12b Title	Class A ordinary shares, par value $0.0001 per share
Trading Symbol	CMCAF
Warrants, each whole warrant exercisable for one Class A ordinary share, each at an exercise price of $11.50 per share [Member]
Document Information Line Items
Security 12b Title	Warrants, each whole warrant exercisable for one Class A ordinary share, each at an exercise price of $11.50 per share
Trading Symbol	CMCAW

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

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Area code of city

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End date of current fiscal year in the format --MM-DD.

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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.

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For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

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No definition available.

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Address Line 1 such as Attn, Building Name, Street Name

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Address Line 2 such as Street or Suite number

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Name of the City or Town

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Code for the postal or zip code

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Name of the state or province.

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A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Indicate if registrant meets the emerging growth company criteria.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Indicate if an emerging growth company has elected not to use the extended transition period for complying with any new or revised financial accounting standards.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

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No definition available.

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Two-character EDGAR code representing the state or country of incorporation.

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The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Local phone number for entity.

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Title of a 12(b) registered security.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Trading symbol of an instrument as listed on an exchange.

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Piermont Valley Acquisition Corp 8-K