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v3.20.1

Operating Segments - Schedule of Segment Reporting Information (Details) (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2020 | Mar. 31, 2019
--- | --- | ---
Segment Reporting [Abstract] |  |
Financed portion amount in the purchase of capital expenditure | $ 82 | $ 4

X
- Definition Financed portion amount in the purchase of capital expenditure. + References No definition available. + Details
Name: | PESI_FinancedPortionAmountInPurchaseOfCapitalExpenditure
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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