XML 75 R60.htm IDEA: XBRL DOCUMENT v3.8.0.1

Significant accounting policies Drafts payable (Details) $ in Thousands	Jan. 31, 2018 USD ($)
Drafts payable [Abstract]
Drafts payable	$ 55

Drafts payable [Abstract]

No definition available.

Name:	ppih_DraftsPayableAbstract
Namespace Prefix:	ppih_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amounts due on drafts payable on the balance sheet date.

No definition available.

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