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Note 15 - Subsequent Events (Details Textual) - USD ($) $ in Millions | Jun. 07, 2022 | Apr. 30, 2022 | Jan. 31, 2022
--- | --- | --- | ---
Accounts Receivable, Outstanding for Several Years |  | $ 3.6 | $ 3.6
Subsequent Event [Member] |  |  |
Proceeds from Collection of Accounts Receivable Outstanding for Several Years | $ 0.9 |  |

X
- Definition Represents the amount of accounts receivable, inclusive of retention receivables, that have been outstanding for several years as of the balance sheet date. + References No definition available. + Details
Name: | ppih_AccountsReceivableOutstandingForSeveralYears
Namespace Prefix: | ppih_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the proceeds received during the period from the collection of accounts receivable that have been outstanding for several years. + References No definition available. + Details
Name: | ppih_ProceedsFromCollectionOfAccountsReceivableOutstandingForSeveralYears
Namespace Prefix: | ppih_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |