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Basis of Presentation (Details Narrative) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Finite risk sinking fund	$ 16,052	$ 15,971	$ 15,726

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- Definition

As of the balance sheet date, the total amount into the sinking fund, along with interest income earned, in connection for the company's closure policies.

+ References

No definition available.

+ Details

Name:	PESI_FiniteRiskSinkingFund
Namespace Prefix:	PESI_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration