Cover |
Mar. 26, 2026 |
|---|---|
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 26, 2026 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 000-12957 |
| Entity Registrant Name | VISKASE HOLDINGS, INC. |
| Entity Central Index Key | 0000727510 |
| Entity Tax Identification Number | 22-2372868 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 333 East Butterfield Road |
| Entity Address, Address Line Two | Suite 400 |
| Entity Address, City or Town | Lombard |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60148 |
| City Area Code | 630 |
| Local Phone Number | 874-0700 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Information, Former Legal or Registered Name | ENZON PHARMACEUTICALS, INC. |
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- Definition End date of current fiscal year in the format --MM-DD. No definition available.
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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 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'. No definition available.
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- Definition Address Line 2 such as Street or Suite number No definition available.
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- Definition Name of the City or Town No definition available.
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- Definition Indicate if registrant meets the emerging growth company criteria. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Two-character EDGAR code representing the state or country of incorporation. No definition available.
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- Definition Former Legal or Registered Name of an entity 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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