| Cover | Jan. 20, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 20, 2022 |
| 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 | Suite 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, Par Value, $.001 Per Share |
| Trading Symbol | PESI |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Information, Former Legal or Registered Name | Not applicable |
