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MARKETABLE SECURITIES - Unrealized Losses (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Marketable Securities Abstract |  |
Unrealized losses on marketable securities | $ 0 | $ 0

X
- Definition Amount of unrealized loss on investment in securities classified as available-for-sale recognized in earnings. + References No definition available. + Details
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Namespace Prefix: | powi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_MarketableSecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration