Represents the debt covenvant of minimum tangible adjusted net worth of the credit agreement.

No definition available.

Name:	pesi_DebtInstrumentCovenantComplianceMinimumTangibleAdjustedNetWorth
Namespace Prefix:	pesi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Note 12 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($)	Aug. 02, 2016	Aug. 22, 2016	Aug. 21, 2016
Revised Loan Agreement [Member] \| PNC Bank [Member]
Debt Instrument, Covenant Compliance, Minimum Tangible Adjusted Net Worth		$ 26,000,000	$ 30,000,000
Lenders [Member]
Class of Warrant or Right, Exercised During Period	35,000
Proceeds from Warrant Exercises	$ 156,000