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SCHEDULE OF INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |  |
Permits, beginning balance | $ 8,922 | $ 8,790
Permits in progress | 433 | 132
Permit renewal | 121 |
Permits, ending balance | $ 9,476 | $ 8,922

X
- Definition Costs associated with permits in progress. + References No definition available. + Details
Name: | PESI_PermitInProgress
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Costs associated with permit renewal. + References No definition available. + Details
Name: | PESI_PermitRenewal
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Carrying amount (net of any accumulated depreciation) as of the balance sheet date of operating permits having definite or indefinite lives. + References No definition available. + Details
Name: | PESI_Permits
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration