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Restructuring (Narrative) (Details)	1 Months Ended
	Jun. 30, 2019
June 2019 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Approximate reduction in workforce from restructuring plan (percent)	2.00%
August 2020 Plan
Restructuring Cost and Reserve [Line Items]
Approximate reduction in workforce from restructuring plan (percent)	14.00%
January 2020 Plan
Restructuring Cost and Reserve [Line Items]
Approximate reduction in workforce from restructuring plan (percent)	400.00%

X

- Definition

The number of positions eliminated during the period as a percentage of total positions eliminated during the period in connection with the restructuring plan(s).

+ References

No definition available.

+ Details

Name:	us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedPeriodPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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_RestructuringCostAndReserveLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RestructuringPlanAxis=pxlw_June2019PlanMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RestructuringPlanAxis=pxlw_August2020PlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RestructuringPlanAxis=pxlw_January2020PlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: