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Document and Entity Information
Apr. 10, 2024
Entity Listings [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Apr. 10, 2024
Entity File Number 814-00818
Entity Registrant Name PHENIXFIN CORPORATION
Entity Central Index Key 0001490349
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 27-4576073
Entity Address, Address Line One 445 Park Avenue
Entity Address, Address Line Two 10th Floor
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10022
City Area Code 212
Local Phone Number 859-0390
Entity Emerging Growth Company false
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Common Stock [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Common Stock, par value $0.001 per share
Trading Symbol PFX
Security Exchange Name NASDAQ
5.25% Notes due 2028 [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security 5.25% Notes due 2028
Trading Symbol PFXNZ
Security Exchange Name NASDAQ