XML 54 R43.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Capital Stock, Stock Plans and Stock-Based Compensation (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended
--- | --- | --- | ---
Jan. 18, 2018 | Jan. 13, 2017 | Jan. 13, 2017 | Mar. 31, 2018 | Mar. 31, 2017
Non-qualified stock options, shares, granted |  |  |  | 6,000 | 6,000
Stock options, grants in period, exercise price |  |  |  | $ 4.05 | $ 3.79
Unrecognized compensation cost related to unvested options |  |  |  | $ 547 |
Employee and director service share-based compensation nonvested awards, compensation not yet recognized, stock options, remainder of fiscal year |  |  |  | 148 |
Employee and director service share-based compensation nonvested awards, compensation not yet recognized, stock options, year two |  |  |  | 126 |
Employee and director service share-based compensation nonvested awards, compensation not yet recognized, stock options, year three |  |  |  | 114 |
Employee and director service share-based compensation nonvested awards, compensation not yet recognized, stock options, year four |  |  |  | 114 |
Employee and director service share-based compensation nonvested awards, compensation not yet recognized, stock options, year five |  |  |  | 45 |
Allocated share-based compensation expense |  |  |  | 46 | $ 23
Employee Stock Options [Member] |  |  |  |  |
Allocated share-based compensation expense |  |  |  | 10 | $ 11
2003 Outside Directors Stock Plan [Member] |  |  |  |  |
Allocated share-based compensation expense |  |  |  | $ 64 |
Stock issued during period, shares, issued for services |  |  |  | 16,074 |
2003 Outside Directors Stock Plan [Member] | New Director [Member] |  |  |  |  |
Non-qualified stock options, shares, granted | 6,000 |  | 6,000 |  |
Stock options granted contractual term | 10 years |  | 10 years |  |
Stock options, grants in period, exercise price | $ 4.05 |  | $ 3.79 |  |
2003 Outside Directors Stock Plan [Member] | New Director [Member] | Employee Stock Options [Member] |  |  |  |  |
Stock options granted vesting period | 6 months | 6 months |  |  |

X
- Definition Employee and director service share-based compensation nonvested awards, compensation not yet recognized, stock options, remainder of fiscal year. + References No definition available. + Details
Name: | PESI_EmployeeAndDirectorServiceSharebasedCompensationNonvestedAwardsCompensationNotYetRecognizedStockOptionsRemainderOfFiscalYear
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Employee and director service share-based compensation nonvested awards, compensation not yet recognized, stock options, year five. + References No definition available. + Details
Name: | PESI_EmployeeAndDirectorServiceSharebasedCompensationNonvestedAwardsCompensationNotYetRecognizedStockOptionsYearFive
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Employee and director service share-based compensation nonvested awards, compensation not yet recognized, stock options, year four. + References No definition available. + Details
Name: | PESI_EmployeeAndDirectorServiceSharebasedCompensationNonvestedAwardsCompensationNotYetRecognizedStockOptionsYearFour
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Employee and director service share-based compensation nonvested awards, compensation not yet recognized, stock options, year three. + References No definition available. + Details
Name: | PESI_EmployeeAndDirectorServiceSharebasedCompensationNonvestedAwardsCompensationNotYetRecognizedStockOptionsYearThree
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Employee and director service share-based compensation nonvested awards, compensation not yet recognized, stock options, year two. + References No definition available. + Details
Name: | PESI_EmployeeAndDirectorServiceSharebasedCompensationNonvestedAwardsCompensationNotYetRecognizedStockOptionsYearTwo
Namespace Prefix: | PESI_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders. + References No definition available. + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=us-gaap_DirectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |