Annual report [Section 13 and 15(d), not S-K Item 405]

Cover

v3.26.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 02, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Current Fiscal Year End Date --12-31    
Entity File Number 1-11596    
Entity Registrant Name PERMA FIX ENVIRONMENTAL SERVICES INC    
Entity Central Index Key 0000891532    
Entity Tax Identification Number 58-1954497    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 8302 Dunwoody Place    
Entity Address, Address Line Two #250    
Entity Address, City or Town Atlanta    
Entity Address, State or Province GA    
Entity Address, Postal Zip Code 30350    
City Area Code (770)    
Local Phone Number 587-9898    
Title of 12(b) Security Common Stock, $.001 Par Value    
Trading Symbol PESI    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 180,282,376
Entity Common Stock, Shares Outstanding   18,547,539  
Documents Incorporated by Reference [Text Block] None    
Document Financial Statement Error Correction [Flag] false    
Entity Listing, Par Value Per Share $ 0.001    
Auditor Firm ID 248    
Auditor Opinion [Text Block] We have audited the accompanying consolidated balance sheets of Perma-Fix Environmental Services, Inc. (a Delaware corporation) and subsidiaries (the “Company”) as of December 31, 2025 and 2024, the related consolidated statements of operations, comprehensive loss, shareholders’ equity, and cash flows for the years then ended, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2025 and 2024, and the results of its operations and its cash flows for the years then ended, in conformity with accounting principles generally accepted in the United States of America.    
Auditor Name GRANT THORNTON LLP    
Auditor Location Atlanta, Georgia