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Note 10 - Leases (Details Textual) $ in Thousands, د.إ in Millions, $ in Millions	3 Months Ended				6 Months Ended	12 Months Ended
	Jul. 31, 2022 USD ($)	Apr. 30, 2022 USD ($)	Jul. 31, 2021 USD ($)	Oct. 31, 2020 AED (د.إ)	Jul. 31, 2022 USD ($)	Jan. 31, 2020 USD ($)	Jan. 31, 2018 USD ($)	Jan. 31, 2022 USD ($)	Jan. 31, 2020 CAD ($)	Jan. 31, 2018 CAD ($)
Operating Lease, Liability, Total	$ 8,091				$ 8,091			$ 12,766
Operating Lease, Right-of-Use Asset	7,176				7,176			11,213
Finance Lease, Liability, Total	347				347			$ 530
Operating Lease, Expense	700		$ 700
Other Assets [Member]
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total	600				600
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)								30 years
Minimum [Member]
Lessee, Operating Lease, Term of Contract (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%			8.00%
Finance Vehicle Equipment, One [Member] | Maximum [Member]
Interest Rate for Finance Lease							7.80%			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%			4.00%
Abu Dhabi Land Lease [Member]
Lessee, Operating Lease, Annual Payment				د.إ 1.2	300
Decrease in Operating Lease Liability, Current	300				300
Decrease in Operating Lease Liability, Noncurrent	4,000				4,000
Decrease in Operating Lease Right-of-use Asset	$ 3,600				$ 3,600
Decrease in Operating Lease Expense		$ 800

X

- Definition

The amount of decrease in operating lease expense during the reporting period.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of decrease in the current portion of operating lease liability during the reporting period.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of decrease in the non-current portion of the operating lease liability as of the reporting period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ppih_
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Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of decrease in the operating lease right-of-use asset as of the reporting period.

+ References

No definition available.

+ Details

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

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- Definition

Contractual interest rate for finance lease.

+ References

No definition available.

+ Details

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Namespace Prefix:	ppih_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the amount of payment expected to be made per year under operating lease of lessee.

+ References

No definition available.

+ Details

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

X

- 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 https://asc.fasb.org/extlink&oid=128292326&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 https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

+ Details

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

X

- 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 https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	instant

X

- 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 https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980

+ Details

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

X

- 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 https://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977

+ Details

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Balance Type:	debit
Period Type:	duration

X

- 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 https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

+ Details

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

X

- Definition

Amount of lessee's right to use underlying asset under 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 (a)
-URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

+ Details

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- Details

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- Details

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Namespace Prefix:
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