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v3.20.1

Profit Sharing Plan (Details Narrative) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) Integer | Dec. 31, 2018 USD ($)
Retirement Benefits [Abstract] |  |
Minimum age for full time employees to participate in plan | 18 |
Number of quarterly open periods for enrollment | 4 |
Defined contribution plan, maximum annual contributions per employee, percent | 100.00% |
Defined contribution plan, employer matching contribution, percent of employees' gross pay | 25.00% |
Defined contribution plan employers contribution vesting period | 5 years |
Defined contribution plan, employer discretionary contribution amount | $ | $ 395 | $ 338

X
- Definition Refers to vesting period of employers contribution. + References No definition available. + Details
Name: | PESI_DefinedContributionPlanEmployersContributionVestingPeriod
Namespace Prefix: | PESI_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Refers to minimum age for full time employees to participate in the plan. + References No definition available. + Details
Name: | PESI_MinimumAgeForFullTimeEmployeesToParticipateInPlan
Namespace Prefix: | PESI_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of quarterly open periods for enrollment in the Company's 401(k) Plan. + References No definition available. + Details
Name: | PESI_NumberOfQuarterlyOpenPeriodsForEnrollment
Namespace Prefix: | PESI_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration