|
Note 4 - Capital Stock, Stock Plans and Stock Based Compensation (Details) (USD $)
|
3 Months Ended |
0 Months Ended |
|
|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
Jul. 25, 2011
|
Dec. 31, 2014
|
Dec. 31, 2013
|
| Note 4 - Capital Stock, Stock Plans and Stock Based Compensation (Details) [Line Items] |
|
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
|
|
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number |
222,766us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
|
[1] |
340,800us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
|
[1] |
|
239,023us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
|
362,800us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number |
213,966us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
|
|
340,800us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share) |
$ 7.89us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
|
[1] |
$ 9.62us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
|
[1] |
|
$ 7.81us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
|
$ 9.53us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term |
5 years
|
[1] |
2 years 255 days
|
[1] |
|
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit (in Dollars per share) |
$ 2.79us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
|
|
$ 2.79us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
|
|
|
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit (in Dollars per share) |
$ 14.75us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
|
|
$ 14.75us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
|
|
|
|
|
| Reduction in Stock Based Compensation Expense (in Dollars) |
|
|
$ 54,000pesi_ReductionInStockBasedCompensationExpense
|
|
|
|
|
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share) |
$ 0us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
|
|
$ 0us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
|
|
|
|
|
| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars) |
112,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
|
|
|
|
|
|
|
| Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Remaining Fiscal Year (in Dollars) |
40,000pesi_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedRemainingFiscalYear
|
|
|
|
|
|
|
| Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized, Next Twelve Months (in Dollars) |
53,000pesi_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedNextTwelveMonths
|
|
|
|
|
|
|
| Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized In Year Two (in Dollars) |
$ 19,000pesi_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedInYearTwo
|
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |
1,257us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
|
|
0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
|
|
|
|
|
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in Dollars per share) |
$ 2.79us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
|
|
$ 0us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
|
|
|
|
|
| Employee Stock Option [Member] | Contractual Term with One-third Yearly Vesting [Member] | Chief Operating Officer [Member] | The 2010 Stock Option Plan [Member] |
|
|
|
|
|
|
|
| Note 4 - Capital Stock, Stock Plans and Stock Based Compensation (Details) [Line Items] |
|
|
|
|
|
|
|
| Share Based Compensation Maximum Contractual Term |
|
|
|
|
6 years
|
|
|
| Employee Stock Option [Member] | The 2010 Stock Option Plan [Member] |
|
|
|
|
|
|
|
| Note 4 - Capital Stock, Stock Plans and Stock Based Compensation (Details) [Line Items] |
|
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number |
55,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= pesi_The2010StockOptionPlanMember
|
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= pesi_The2010StockOptionPlanMember
|
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share) |
$ 5.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= pesi_The2010StockOptionPlanMember
|
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term |
5 years 109 days
|
|
|
|
|
|
|
| Director Stock Options [Member] | The 2003 Outside Directors Stock Plan [Member] |
|
|
|
|
|
|
|
| Note 4 - Capital Stock, Stock Plans and Stock Based Compensation (Details) [Line Items] |
|
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number |
167,766us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= pesi_DirectorStockOptionsMember
/ us-gaap_PlanNameAxis
= pesi_The2003OutsideDirectorsStockPlanMember
|
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number |
167,766us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
/ us-gaap_AwardTypeAxis
= pesi_DirectorStockOptionsMember
/ us-gaap_PlanNameAxis
= pesi_The2003OutsideDirectorsStockPlanMember
|
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share) |
$ 8.84us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= pesi_DirectorStockOptionsMember
/ us-gaap_PlanNameAxis
= pesi_The2003OutsideDirectorsStockPlanMember
|
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term |
4 years 328 days
|
|
|
|
|
|
|
| Chief Operating Officer [Member] | The 2010 Stock Option Plan [Member] |
|
|
|
|
|
|
|
| Note 4 - Capital Stock, Stock Plans and Stock Based Compensation (Details) [Line Items] |
|
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |
|
|
|
|
60,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= pesi_The2010StockOptionPlanMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefOperatingOfficerMember
|
|
|
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share) |
|
|
|
|
7.85us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= pesi_The2010StockOptionPlanMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefOperatingOfficerMember
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |
|
|
|
|
3 years
|
|
|
| The 2003 Outside Directors Stock Plan [Member] |
|
|
|
|
|
|
|
| Note 4 - Capital Stock, Stock Plans and Stock Based Compensation (Details) [Line Items] |
|
|
|
|
|
|
|
| Stock Issued During Period, Shares, Share-based Compensation, Gross |
16,075us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross
/ us-gaap_PlanNameAxis
= pesi_The2003OutsideDirectorsStockPlanMember
|
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |
1,257us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_PlanNameAxis
= pesi_The2003OutsideDirectorsStockPlanMember
|
|
|
|
|
|
|
| Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures |
1,257us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
/ us-gaap_PlanNameAxis
= pesi_The2003OutsideDirectorsStockPlanMember
|
|
|
|
|
|
|
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in Dollars per share) |
$ 2.79us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= pesi_The2003OutsideDirectorsStockPlanMember
|
|
|
|
|
|
|
|
|
|