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v3.19.2

Operating Segments - Schedule of Segment Reporting Information (Details) (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Segment Reporting [Abstract] |  |  |  |
Net gain on exchange offer of Series B Preferred Stock of subsidiary |  | $ 1,596 |  | $ 1,596

X
- Definition Net gain on exchange offer of preferred stock of subsidiary. + References No definition available. + Details
Name: | PESI_NetGainOnExchangeOfferOfPreferredStockOfSubsidiary
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