v3.6.0.2

Note 18 - Subsequent Events (Details Textual) - Subsequent Event [Member]	Jan. 19, 2017 USD ($)
Chief Operating Officer [Member]
Employment Agreement Term	3 years
Annual Salary for Executive Vice President	$ 267,000
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Minimum, Percentage	5.00%
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Maximum, Percentage	100.00%
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Minimum, Amount	$ 13,350
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Maximum, Amount	$ 267,000
Chief Executive Officer [Member]
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Minimum, Percentage	5.00%
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Maximum, Percentage	100.00%
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Minimum, Amount	$ 13,962
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Maximum, Amount	$ 279,248
Chief Financial Officer [Member]
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Minimum, Percentage	5.00%
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Maximum, Percentage	100.00%
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Minimum, Amount	$ 11,033
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Maximum, Amount	$ 220,667

Represents the annual salary for the executive vice president.

No definition available.

Name:	pesi_AnnualSalaryForExecutiveVicePresident
Namespace Prefix:	pesi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Maximum cash incentive payable under Management Incentive Plan.

No definition available.

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

Maximum cash incentive payable expressed as a percentage of the individual base salary.

No definition available.

Name:	pesi_DeferredCompensationArrangementWithIndividualCashAwardsGrantedMaximumPercentage
Namespace Prefix:	pesi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Minimum cash incentive payable under Management Incentive Plan.

No definition available.

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

Minimum cash incentive payable expressed as a percentage of the individual base salary.

No definition available.

Name:	pesi_DeferredCompensationArrangementWithIndividualCashAwardsGrantedMinimumPercentage
Namespace Prefix:	pesi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the the effective term of employment agreements with executives.

No definition available.

Name:	pesi_EmploymentAgreementTerm
Namespace Prefix:	pesi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_ChiefOperatingOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_ChiefFinancialOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: