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Business and segment information Segment information (Tables) | 12 Months Ended
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Jan. 31, 2014
Segment information [Line Items] |
Segment information [Table Text Block] | Segment information was as follows:
| 2013 | 2012
Net sales |  |
Piping Systems | $158,422 | $89,664
Filtration Products | 68,413 | 79,143
Total net sales | $226,835 | $168,807
Gross profit |  |
Piping Systems | $43,273 | $17,020
Filtration Products | 8,942 | 10,474
Total gross profit | $52,215 | $27,494
Income (loss) from operations |  |
Piping Systems | $24,213 | $3,452
Filtration Products | (1,629) | (2,962)
Corporate | (9,501) | (9,310)
Total income (loss) from operations | $13,083 | $(8,820)
Segment assets |  |
Piping Systems | $109,154 | $83,944
Filtration Products | 41,765 | 52,958
Corporate | 12,350 | 12,586
Total segment assets | $163,269 | $149,488
Capital expenditures |  |
Piping Systems | $2,425 | $4,206
Filtration Products | 294 | 995
Corporate | 42 | 159
Total capital expenditures | $2,761 | $5,360
Depreciation and amortization |  |
Piping Systems | $3,489 | $3,344
Filtration Products | 1,729 | 1,750
Corporate | 567 | 712
Total depreciation and amortization | $5,785 | $5,806
Interest expense, net |  |
Piping Systems | $495 | $226
Filtration Products | 1,966 | 2,239
Corporate | (1,150) | (967)
Total interest expense, net | $1,311 | $1,498
Impairment of fixed assets |  |
Filtration Products | $0 | $1,520
Geographic information [Table Text Block] | Geographic information. Net sales are attributed to a geographic area based on the destination of the product shipment. Sales to foreign customers was 57% in 2013 compared to 30% in 2012. 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.
| 2013 | 2012
Net sales |  |
United States | $97,311 | $104,830
Middle East | 94,500 | 24,631
Europe | 14,933 | 16,324
Canada | 7,591 | 9,771
India | 773 | 6,317
Other Americas | 6,915 | 2,317
Other | 4,812 | 4,617
Total net sales | $226,835 | $168,807
Long-lived assets |  |
United States | $25,260 | $26,952
Middle East | 12,751 | 13,204
Denmark | 4,020 | 4,445
India | 510 | 981
Total long-lived assets | $42,541 | $45,582

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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=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 Reference 3: 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=6534315&loc=d3e9038-108599 + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 + Details
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