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Balance Sheet Components (Other Assets, Net) (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract] |  |
Amortization of licensed technology | $ 336 | $ 217

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- Definition amortization of licensed technology + References No definition available. + Details
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Namespace Prefix: | pxlw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration