v3.26.1
Cover Page
Sep. 01, 2026
Entity Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Sep. 01, 2026
Securities Act File Number 814-00736
Entity Registrant Name PennantPark Investment Corporation
Entity Central Index Key 0001383414
Entity Incorporation, State or Country Code MD
Entity Tax Identification Number 20-8250744
Entity Address, Address Line One 1691 Michigan Avenue
Entity Address, City or Town Miami Beach
Entity Address, State or Province FL
Entity Address, Postal Zip Code 33139
City Area Code 786
Local Phone Number 297-9500
Title of 12(b) Security Common Stock, par value $0.001 per share
Trading Symbol PNNT
Security Exchange Name NYSE
Entity Emerging Growth Company false
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false