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

X

- Definition

Net gain on exchange offer of preferred stock of subsidiary.

+ References

No definition available.

+ Details

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Namespace Prefix:	PESI_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: