XML 61 R49.htm IDEA: XBRL DOCUMENT
v3.25.3

Commitments and Contingencies (Details Narrative) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2003 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
CommitmentsAndContingenciesLineItems [Line Items] |  |  |  |  |  |
Self-insured retention |  |  |  | $ 1,000,000 |  |
Restricted cash, noncurrent |  | $ 13,084,000 |  | 13,084,000 |  | $ 12,680,000
Interest income |  | 266,000 | $ 292,000 | 901,000 | $ 679,000 |
Letters of credit outstanding, amount |  | 3,350,000 |  | 3,350,000 |  |
Bond outstanding |  | 16,044,000 |  | 16,044,000 |  |
American International Group, Inc [Member] |  |  |  |  |  |
CommitmentsAndContingenciesLineItems [Line Items] |  |  |  |  |  |
Period of finite risk insurance policy | 25 years |  |  |  |  |
Maximum allowable coverage of insurance policy |  | 28,177,000 |  | 28,177,000 |  |
Coverage amount under the policy |  | 23,951,000 |  | 23,951,000 |  |
Restricted cash, noncurrent |  | 13,084,000 |  | 13,084,000 |  | 12,680,000
Interest income |  | $ 131,000 | $ 153,000 | $ 404,000 | $ 451,000 |
Insurers obligation to entity on termination of contract |  | 100.00% |  | 100.00% |  |
American International Group, Inc [Member] | Finite Risk Sinking Funds [Member] |  |  |  |  |  |
CommitmentsAndContingenciesLineItems [Line Items] |  |  |  |  |  |
Interest income |  |  |  | $ 3,613,000 |  | $ 3,209,000
2017 Stock Option Plan [Member] | Michael O'Neill [Member] |  |  |  |  |  |
CommitmentsAndContingenciesLineItems [Line Items] |  |  |  |  |  |
Number of additional shares issuable |  |  |  | 600,000 |  |

X
- Definition The total amount of the bonds outstanding as of the reporting date. + References No definition available. + Details
Name: | PESI_BondOutstanding
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Coverage amount under the policy. + References No definition available. + Details
Name: | PESI_CoverageAmountUnderPolicy
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Insurer's obligation to entity on termination of contract in terms of percentage of sinking fund. + References No definition available. + Details
Name: | PESI_InsurersObligationToEntityOnTerminationOfContract
Namespace Prefix: | PESI_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum allowable coverage of insurance policy against annual inflation and other performance and surety bond requirements. + References No definition available. + Details
Name: | PESI_MaximumAllowableCoverageOfInsurancePolicy
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Period of finite risk insurance policy. + References No definition available. + Details
Name: | PESI_PeriodOfFiniteRiskInsurancePolicy
Namespace Prefix: | PESI_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Self insured retention. + References No definition available. + Details
Name: | PESI_SelfinsuredRetention
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of interest income earned from interest bearing assets classified as other. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org/1943274/2147476153/220-40-55-21 + Details
Name: | us-gaap_InterestIncomeOther
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 55 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477548/944-605-55-15 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477548/944-605-55-12 + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of cash restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 5 -SubTopic 210 -Topic 954 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477220/954-210-45-5 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-8 + Details
Name: | us-gaap_RestrictedCashNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of additional shares authorized for issuance under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-4 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_CounterpartyNameAxis=PESI_AmericanInternationalGroupIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=PESI_FiniteRiskSinkingFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=PESI_TwoThousandAndSeventeenStockOptionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=PESI_MichaelONeillMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |