XML 69 R50.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

STOCK PLANS AND SHARE BASED COMPENSATION (Stock-Based Compensation) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |  |
Stock-based compensation expense | $ 23,347 | $ 21,580 | $ 24,677
Unrecognized compensation costs | 37,111 |  |
Cost of revenues [Member] |  |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |  |
Stock-based compensation expense | 1,237 | 1,097 | 1,321
Research and Development Expense [Member] |  |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |  |
Stock-based compensation expense | 8,423 | 7,688 | 8,496
Selling and Marketing Expense [Member] |  |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |  |
Stock-based compensation expense | 5,015 | 4,729 | 5,197
General and Administrative Expense [Member] |  |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |  |
Stock-based compensation expense | $ 8,672 | 8,066 | 9,663
Stock Options [Member] |  |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |  |
Awards vesting period | 4 years |  |
Performance Based Awards, Long-term and Short-term [Member] |  |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |  |
Stock-based compensation expense | $ 4,100 | 3,400 | 8,200
Long-Term Performance-based Awards [Member] |  |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |  |
Performance based period | 3 years |  |
Unrecognized compensation costs | $ 1,693 |  |
Unrecognized compensation costs, period of recognition (in years) | 2 years |  |
Number of performance-based awards shares released as a percentage of target number, minimum | 0.00% |  |
Number of performance-based awards shares released as a percentage of target number, maximum | 200.00% |  |
Restricted Stock Units (RSUs) [Member] |  |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |  |
Awards vesting period | 4 years |  |
Stock-based compensation expense | $ 17,500 | 16,600 | 15,200
Unrecognized compensation costs | $ 35,276 |  |
Unrecognized compensation costs, period of recognition (in years) | 2 years 11 months 8 days |  |
Employee Stock [Member] |  |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |  |
Stock-based compensation expense | $ 1,700 | $ 1,600 | $ 1,300
Unrecognized compensation costs | $ 142 |  |
Unrecognized compensation costs, period of recognition (in years) | 1 hour |  |

X
- Definition NumberOfPerformanceBasedAwardsShares ReleasedAsPercentageOfTargetNumberMaximum + References No definition available. + Details
Name: | powi_NumberOfPerformanceBasedAwardsSharesReleasedAsPercentageOfTargetNumberMaximum1
Namespace Prefix: | powi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition NumberOfPerformanceBasedAwardsShares ReleasedAsPercentageOfTargetNumberMinimum + References No definition available. + Details
Name: | powi_NumberOfPerformanceBasedAwardsSharesReleasedAsPercentageOfTargetNumberMinimum1
Namespace Prefix: | powi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_ResearchAndDevelopmentExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SellingAndMarketingExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_GeneralAndAdministrativeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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