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Note 4 - Revenue Recognition (Details Textual) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2025	Jan. 31, 2025
Costs Incurred for Uncompleted Contracts, Anticipated Collection Period (Year)	1 year
Unbilled Receivables, Current	$ 28,453	$ 18,936

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

X

- Definition

Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

Name:	us-gaap_UnbilledReceivablesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant