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Business information Geographic information (Tables) | 12 Months Ended
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Jan. 31, 2018
Geographic information [Line Items] |
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] | Geographic information. Net sales attributed to a geographic area are based on the destination of the product shipment. Sales to foreign customers was 59.5% in 2017 compared to 57.0% in 2016. Long-lived assets are based on the physical location of the assets and consist of property, plant and equipment used in the generation of revenues in the geographic area.
(In thousands) | 2017 | 2016
Net sales |  |
United States | $42,648 | $42,048
Canada | 31,206 |  | 25,915 |
Middle East | 26,322 |  | 28,009 |
India | 1,317 |  | 2,360 |
Other | 3,755 |  | 513 |
Total net sales | $105,248 | $98,845
Property, plant and equipment, net of accumulated depreciation |  |
United States | $11,307 | $11,747
Canada | 13,868 | 13,276
Middle East | 9,119 | 10,987
India | 215 | 265
Total | $34,509 | $36,275

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 + Details
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