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Note 11 - Accrued Closure Costs and Asset Retirement Obligations ("ARO") (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Asset Retirement Obligation Disclosure [Abstract]
Restructuring Reserve Adjustment To Pretax Loss	$ (448,000)pesi_RestructuringReserveAdjustmentToPretaxLoss

X

- Definition

Impact to pretax loss from adjustment to closure obligation.

+ References

No definition available.

+ Details

Name:	pesi_RestructuringReserveAdjustmentToPretaxLoss
Namespace Prefix:	pesi_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Details

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