Inventory - Additional Information (Details)	3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]
Inventory excess and obsolescence charges, favorable impact on gross margin percentage	2.20%

Inventory excess and obsolescence charges favorable impact on gross margin percentage.

No definition available.

Name:	pi_InventoryExcessAndObsolescenceChargesFavorableImpactOnGrossMarginPercentage
Namespace Prefix:	pi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration