XML 14 R1.htm IDEA: XBRL DOCUMENT v3.25.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2024
Mar. 31, 2025
Jun. 30, 2024
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Financial Statement Error Correction [Flag] false    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag false    
Amendment Flag false    
Document Period End Date Dec. 31, 2024    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Information [Line Items]      
Entity Registrant Name PLUM ACQUISITION CORP. IV    
Entity Central Index Key 0002030482    
Entity File Number 001-42472    
Entity Tax Identification Number 98-1795710    
Entity Incorporation, State or Country Code E9    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Shell Company true    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Entity Public Float     $ 0
Entity Contact Personnel [Line Items]      
Entity Address, Address Line One 2021 Fillmore St. #2089    
Entity Address, City or Town San Francisco    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94115    
Entity Phone Fax Numbers [Line Items]      
City Area Code (929)    
Local Phone Number 529-7125    
Class A ordinary shares, $0.0001 par value per share      
Entity Listings [Line Items]      
Title of 12(b) Security Class A ordinary shares, $0.0001 par value per share    
Trading Symbol PLMK    
Security Exchange Name NASDAQ    
Warrants to purchase one share of Class A ordinary shares      
Entity Listings [Line Items]      
Title of 12(b) Security Warrants to purchase one share of Class A ordinary shares    
Trading Symbol PLMKW    
Security Exchange Name NASDAQ    
Units, each consisting of one share of Class A ordinary shares and one-half of one redeemable warrant      
Entity Listings [Line Items]      
Title of 12(b) Security Units, each consisting of one share of Class A ordinary shares and one-half of one redeemable warrant    
Trading Symbol PLMKU    
Security Exchange Name NASDAQ    
Class A Ordinary Shares      
Entity Listings [Line Items]      
Entity Common Stock, Shares Outstanding   18,492,875  
Class B Ordinary Shares      
Entity Listings [Line Items]      
Entity Common Stock, Shares Outstanding   5,750,000