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Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Statement of Stockholders' Equity [Abstract] |  |
Foreign pension adjustment, tax | $ 10 | $ (1)

X
- Definition Tax amount of the increase (decrease) in accumulated other comprehensive income (loss) related to pension and other postretirement benefit plans, attributable to the parent entity. + References No definition available. + Details
Name: | pxlw_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentTaxPortionAttributableToParent
Namespace Prefix: | pxlw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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