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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2024
Mar. 05, 2025
Jun. 30, 2024
Document Entity Information      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2024    
Entity File Number 1-13412    
Entity Registrant Name HUDSON TECHNOLOGIES INC /NY    
Entity Incorporation, State or Country Code NY    
Entity Tax Identification Number 13-3641539    
Entity Address, Address Line One 300 Tice Boulevard    
Entity Address, Address Line Two Suite 290    
Entity Address, City or Town Woodcliff Lake    
Entity Address, State or Province NJ    
Entity Address, Postal Zip Code 07677    
City Area Code 845    
Local Phone Number 735-6000    
Title of 12(b) Security Common stock, $0.01 par value    
Trading Symbol HDSN    
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 Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 387,024,597
Entity Common Stock, Shares Outstanding   44,025,108  
Amendment Flag false    
Auditor Name BDO USA, P.C.    
Auditor Firm ID 243    
Auditor Location Stamford    
Entity Central Index Key 0000925528    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Documents Incorporated by Reference [Text Block]

Portions of the Registrant’s Proxy Statement for its Annual Meeting of Stockholders to be held on June 11, 2025, are incorporated by reference in Part III of this Report. Except as expressly incorporated by reference, the Registrant’s Proxy Statement shall not be deemed to be part of this Form 10-K.