Amount of cash outflow for principal payment and interest on finance lease liability.

No definition available.

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Namespace Prefix:	ppih_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Contractual interest rate for finance lease.

+ References

No definition available.

+ Details

Name:	ppih_InterestRateForFinanceLease
Namespace Prefix:	ppih_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

+ Details

Name:	us-gaap_FinanceLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after accumulated amortization, of right-of-use asset from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

+ Details

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

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980

+ Details

Name:	us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977

+ Details

Name:	us-gaap_OperatingLeaseExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

+ Details

Name:	us-gaap_OperatingLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

+ Details

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

- Details

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Balance Type:
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- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ppih_FinanceVehicleEquipmentOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ppih_FinanceVehicleEquipmentTwoMember
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Note 10 - Leases (Details Textual) $ in Thousands, ₨ in Millions, $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 05, 2016 USD ($)	Jul. 31, 2020 USD ($)	Jul. 31, 2019 USD ($)	Jul. 31, 2020 USD ($)	Jul. 31, 2019 USD ($)	Jan. 31, 2020 USD ($)	Jan. 31, 2018 USD ($)	Jan. 31, 2020 CAD ($)	Jan. 31, 2018 CAD ($)	Aug. 05, 2016 INR (₨)
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total		$ 1,000		$ 1,000
Operating Lease, Liability, Total		11,901		11,901		$ 12,254
Operating Lease, Right-of-Use Asset		10,889		10,889		11,475
Finance Lease, Liability, Total		877		877		1,094
Operating Lease, Expense		$ 800	$ 700	$ 1,500	$ 1,400
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)		14 years		14 years
Minimum [Member]
Lessee, Operating Lease, Term of Contract (Year)		1 year		1 year
Finance Vehicle Equipment, One [Member]
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total						$ 800	$ 800	$ 1.1	$ 1.1
Interest Rate for Finance Lease						8.00%
Finance Vehicle Equipment, One [Member] \| Maximum [Member]
Interest Rate for Finance Lease							7.80%
Finance Lease, Principal Payments and Interest Payment on Liability						$ 100	$ 100
Finance Vehicle Equipment, One [Member] \| Minimum [Member]
Interest Rate for Finance Lease							4.00%
Finance Vehicle Equipment, Two [Member]
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total	$ 8									₨ 0.6
Interest Rate for Finance Lease	15.60%
Finance Vehicle Equipment, Two [Member] \| Maximum [Member]
Finance Lease, Principal Payments and Interest Payment on Liability	$ 1