XML 63 R51.htm IDEA: XBRL DOCUMENT
v3.19.1

LEASES Lease Terms and Discount Rate (Details) | 3 Months Ended
--- | ---
Mar. 31, 2019 Rate
Lease Terms and Discount Rate [Line Items] |
Lessee, Operating Lease, Option to Extension Term, Maximum | 6 years
Lessee, Operating Lease, Option to Terminate Term Within | 1 year
Weighted average remaining lease term | 4 years 11 months 13 days
Weighted average discount rate | 4.00%
Minimum [Member] |
Lease Terms and Discount Rate [Line Items] |
Lesee Operating Lease Remaining Lease Term Range | 1 year
Maximum [Member] |
Lease Terms and Discount Rate [Line Items] |
Lesee Operating Lease Remaining Lease Term Range | 9 years

X
- Definition [Line Items] for Lease Terms and Discount Rate [Table] + References No definition available. + Details
Name: | powi_LeaseTermsandDiscountRateLineItems
Namespace Prefix: | powi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lesee, Operating Lease, Option Extension Term, Maximum + References No definition available. + Details
Name: | powi_LeseeOperatingLeaseOptionExtensionTermMaximum
Namespace Prefix: | powi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lesee, Operating Lease, Option to Terminate Term + References No definition available. + Details
Name: | powi_LeseeOperatingLeaseOptiontoTerminateTerm
Namespace Prefix: | powi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lesee Operating Lease Remaining Lease Term Range + References No definition available. + Details
Name: | powi_LeseeOperatingLeaseRemainingLeaseTermRange
Namespace Prefix: | powi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Discount rate used by lessee to determine present value of operating lease payments. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
Name: | us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |