XML 74 R59.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Significant accounting policies Drafts payable (Details) - USD ($) $ in Thousands | Jan. 31, 2017 | Jan. 31, 2016
--- | --- | ---
Drafts payable [Abstract] |  |
Drafts payable | $ 21 | $ 290

X
- Definition Drafts payable [Abstract] + References No definition available. + Details
Name: | ppih_DraftsPayableAbstract
Namespace Prefix: | ppih_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amounts due on drafts payable on the balance sheet date. + References No definition available. + Details
Name: | us-gaap_DraftsPayable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant