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Schedule of Capital Expenditures (Details) (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Segment Reporting [Abstract] |  |  |  |
Equipment purchases subject to financing and finance leases | $ 30 | $ 361 | $ 162 | $ 406

X
- Definition Equipment purchases subject to financing and finance leases. + References No definition available. + Details
Name: | PESI_EquipmentPurchasesSubjectToFinancingAndFinanceLeases
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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