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v3.24.1.u1

Note 8 - Retirement Plans (Details Textual) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jan. 31, 2024 | Jan. 31, 2023
Defined Contribution Plan, Employer Matching Contribution, Percent of Match | 100.00% |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 1.00% |
Defined Contribution Plan, Employer Matching Contribution, Percent of Match, Payroll Deferral Contributions | 50.00% |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay, Payroll Deferral Contributions | 5.00% |
Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 0.4 | $ 0.3
Minimum [Member] |  |
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 1.00% |
Maximum [Member] |  |
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 16.00% |

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching payroll deferral contribution to a defined contribution plan. + References No definition available. + Details
Name: | ppih_DefinedContributionPlanEmployerMatchingContributionPercentOfEmployeesGrossPayPayrollDeferralContributions
Namespace Prefix: | ppih_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of payroll deferral contributions employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | ppih_DefinedContributionPlanEmployerMatchingContributionPercentOfMatchPayrollDeferralContributions
Namespace Prefix: | ppih_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |