Name:	ppih_AccountsReceivableOutstandingForSeveralYears
Namespace Prefix:	ppih_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the balance of the allowance for doubtful accounts pertaining to accounts receivable outstanding for several years.

No definition available.

Name:	ppih_AllowanceForDoubtfulAccountsReceivableOutstandingForSeveralYears
Namespace Prefix:	ppih_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc.

No definition available.

Name:	ppih_NumberOfMajorCustomers
Namespace Prefix:	ppih_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the proceeds received during the period from the collection of accounts receivable that have been outstanding for several years.

No definition available.

Name:	ppih_ProceedsFromCollectionOfAccountsReceivableOutstandingForSeveralYears
Namespace Prefix:	ppih_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Data Type:	num:percentItemType
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Amount billed to customers under long-term contracts or programs that have been withheld because of retainage provisions in a contract.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
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Name:	srt_MajorCustomersAxis=ppih_OneCustomerMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
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