Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Subsequent Events (Details Narrative)

v3.20.2

Subsequent Events (Details Narrative) - USD ($)					6 Months Ended
Subsequent Events (Details Narrative) - USD ($)	Jul. 22, 2020	Jul. 21, 2020	Jul. 09, 2020	Apr. 14, 2020	Jun. 30, 2020	Jul. 24, 2020	May 31, 2016
Repayments of loan amount					$ 832,000
Perma-Fix of Michigan, Inc. [Member]
Disposal group, including discontinued operation, consideration, after closing							$ 375,000
Subsequent Event [Member] \| Perma-Fix of Michigan, Inc. [Member]
Disposal group, including discontinued operation, note receivable payoff						$ 105,000
Lender [Member] \| Subsequent Event [Member] \| Paycheck Protection Program [Member]
Repayments of loan amount			$ 327,000
Richard Grondin [Member] \| Subsequent Event [Member]
Annual salary		$ 208,000
Richard Grondin [Member] \| Subsequent Event [Member] \| New Employment Agreements [Member]
Annual salary	$ 240,000
Richard Grondin [Member] \| Subsequent Event [Member] \| Waste Treatment Operations Employment Agreement [Member] \| Minimum [Member]
Potential target performance compensation of base salary, percentage	5.00%
Base salary of performance compensation	$ 12,000
Richard Grondin [Member] \| Subsequent Event [Member] \| Waste Treatment Operations Employment Agreement [Member] \| Maximum [Member]
Potential target performance compensation of base salary, percentage	100.00%
Base salary of performance compensation	$ 240,000
Paycheck Protection Program Loan [Member] \| Lender [Member]
Loan amount				$ 5,666,300
Repayments of loan amount				$ 327,000

- Definition

Base salary of performance compensation.

+ References

No definition available.

+ Details

Name:	PESI_BaseSalaryOfPerformanceCompensation
Namespace Prefix:	PESI_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation, after closing.

+ References

No definition available.

+ Details

Name:	PESI_DisposalGroupIncludingDiscontinuedOperationConsiderationAfterClosing
Namespace Prefix:	PESI_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of consideration receivable for the disposal of assets and liabilities, including discontinued operation, note receivable payoff.

+ References

No definition available.

+ Details

Name:	PESI_DisposalGroupIncludingDiscontinuedOperationNoteReceivablePayoff
Namespace Prefix:	PESI_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Potential target performance compensation of base salary, percentage.

+ References

No definition available.

+ Details

Name:	PESI_PotentialTargetPerformanceCompensationOfBaseSalaryPercentage
Namespace Prefix:	PESI_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16)(a)(2))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_LoansPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expense for salary and wage arising from service rendered by officer. Excludes allocated cost, labor-related nonsalary expense, and direct and overhead labor cost included in cost of good and service sold.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(4))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

+ Details

Name:	us-gaap_OfficersCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: