| Cover | Jul. 30, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 30, 2024 |
| Entity File Number | 1-13412 |
| Entity Registrant Name | HUDSON TECHNOLOGIES INC /NY |
| Entity Central Index Key | 0000925528 |
| Entity Tax Identification Number | 13-3641539 |
| Entity Incorporation, State or Country Code | NY |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value |
| Trading Symbol | HDSN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
