XML 51 R36.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Costs and estimated earnings on uncompleted contracts Costs and estimated earnings on uncompleted contracts (Tables) | 12 Months Ended
--- | ---
Jan. 31, 2018
Costs and estimated earnings on uncompleted contracts [Abstract] |
Costs and estimated earnings on uncompleted contracts [Table Text Block] |
(In thousands) | 2017 | 2016
Costs incurred on uncompleted contracts | $11,955 | $17,015
Estimated earnings | 6,336 | 16,137
Earned revenue | 18,291 | 33,152
Less billings to date | 18,756 | 32,161
Costs in excess of billings, net | ($465) | $991
Balance sheet classification |  |
Costs and estimated earnings in excess of billings on uncompleted contracts | $1,502 | $2,091
Billings in excess of costs and estimated earnings on uncompleted contracts | (1,967) | (1,100)
Costs in excess of billings, net | ($465) | $991

X
- Definition Costs and estimated earnings on uncompleted contracts [Abstract] + References No definition available. + Details
Name: | ppih_CostsAndEstimatedEarningsOnUncompletedContractsAbstract
Namespace Prefix: | ppih_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the underlying assumptions and percentages or rates used in determining the fair value of guarantee obligations for each type of long-duration contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6482852&loc=d3e14931-158439 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6482852&loc=d3e14944-158439 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6482852&loc=d3e14937-158439 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6481800&loc=d3e11318-158416 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389 + Details
Name: | us-gaap_ScheduleOfAssumptionsForLongDurationContractsByProductAndGuaranteeTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration