Cover |
Feb. 11, 2026 |
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| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 11, 2026 |
| Entity File Number | 000-12957 |
| Entity Registrant Name | ENZON PHARMACEUTICALS, INC. |
| Entity Central Index Key | 0000727510 |
| Entity Tax Identification Number | 22-2372868 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 20 Commerce Drive (Suite 135) |
| Entity Address, City or Town | Cranford |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07016 |
| City Area Code | 732 |
| Local Phone Number | 980-4500 |
| Written Communications | true |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
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- Definition 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. No definition available.
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- Definition Name of the City or Town No definition available.
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- Definition Two-character EDGAR code representing the state or country of incorporation. No definition available.
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- Definition The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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