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v3.20.1

Note 5 - Revenue Recognition (Details Textual) | 12 Months Ended
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Jan. 31, 2020
Costs Incurred for Uncompleted Contracts, Anticipated Collection Period (Year) | 1 year

X
- Definition Represents the duration of time within which costs incurred for uncompleted contracts are anticipated to be collected. + References No definition available. + Details
Name: | ppih_CostsIncurredForUncompletedContractsAnticipatedCollectionPeriod
Namespace Prefix: | ppih_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration