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SCHEDULE OF CREDIT LOSSES FOR FINANCING RECEIVABLES, CURRENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Allowance for doubtful accounts - beginning of year	$ 404	$ 487
Provision for (recovery of) bad debt reserve	41	(101)
(Write-off) recovery of write-off	(360)	18
Allowance for doubtful accounts - end of year	$ 85	$ 404

X

- Definition

Increase/decrease in allowance for doubtful account due to provision or recovery of bad debt reserves.

+ References

No definition available.

+ Details

Name:	PESI_AllowanceForDoubtfulAccountsReceivableRecoveriesProvision
Namespace Prefix:	PESI_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Increase/decrease in allowance for doubtful account due to recovery of write off or write off.

+ References

No definition available.

+ Details

Name:	PESI_AllowanceForDoubtfulAccountsReceivableRecoveriesWriteOffsOrWriteOff
Namespace Prefix:	PESI_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

Amount of allowance for credit loss on accounts receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

+ Details

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