XML 49 R38.htm IDEA: XBRL DOCUMENT
v3.20.2

Revenue - Schedule of Contract Assets and Liabilities (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Account receivables, net of allowance | $ 13,442 | $ 13,178
Unbilled receivables - current | 14,366 | 7,984
Deferred revenue | 4,806 | $ 5,456
Year-to-date Change [Member] |  |
Account receivables, net of allowance | 264 |
Unbilled receivables - current | 6,382 |
Deferred revenue | $ (650) |
Changes in Account receivables, net of allowance, percentage | 2.00% |
Changes in Unbilled receivables - current, percentage | 79.90% |
Changes in Deferred revenue, percentage | (11.90%) |

X
- Definition Percentage of change in unbilled receivables - current percentage. + References No definition available. + Details
Name: | PESI_ChangeInUnbilledReceivablesCurrentPercentage
Namespace Prefix: | PESI_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of change in account receivables, net of allowance. + References No definition available. + Details
Name: | PESI_ChangesInAccountReceivablesNetOfAllowancePercentage
Namespace Prefix: | PESI_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of change in deferred revenue. + References No definition available. + Details
Name: | PESI_ChangesInDeferredRevenuePercentage
Namespace Prefix: | PESI_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 Reference 2: 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(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6676-107765 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4531-111522 + Details
Name: | us-gaap_AccountsReceivableNetCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is 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(5)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DeferredRevenueCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer. + References No definition available. + Details
Name: | us-gaap_UnbilledReceivablesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_EffectOfFourthQuarterEventsByTypeAxis=us-gaap_YearEndAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |