XML 54 R27.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Business segment reporting (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 31, 2014 | Oct. 31, 2013 | Oct. 31, 2014 Segments | Oct. 31, 2013 | Oct. 31, 2014 Piping Systems [Member] | Oct. 31, 2013 Piping Systems [Member] | Oct. 31, 2014 Piping Systems [Member] | Oct. 31, 2013 Piping Systems [Member] | Oct. 31, 2014 Filtration Products [Member] | Oct. 31, 2013 Filtration Products [Member] | Oct. 31, 2014 Filtration Products [Member] | Oct. 31, 2013 Filtration Products [Member] | Oct. 31, 2014 Corporate Segment [Member] | Oct. 31, 2013 Corporate Segment [Member] | Oct. 31, 2014 Corporate Segment [Member] | Oct. 31, 2013 Corporate Segment [Member] | Oct. 31, 2014 Credit Concentration Risk [Member] | Jan. 31, 2014 Credit Concentration Risk [Member] | Oct. 31, 2013 Sales Revenue, Net [Member]
Segment reporting |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information, Description of Products and Services |  |  |  |  |  |  | Piping Systems which engineers, designs, manufactures and sells specialty piping, leak detection and location systems |  |  |  | Filtration Products, which manufactures custom-designed industrial filtration products to remove particulates from air and other gas streams |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33.00% | 24.00% | 13.00%
Net sales | $ 43,819 | $ 57,967 | $ 156,713 | $ 173,460 | $ 26,540 | $ 42,289 | $ 102,683 | $ 121,825 | $ 17,279 | $ 15,678 | $ 54,030 | $ 51,635 |  |  |  |  |  |  |
Gross profit | 6,721 | 16,887 | 33,255 | 43,037 | 4,609 | 14,726 | 25,913 | 35,760 | 2,112 | 2,161 | 7,342 | 7,277 |  |  |  |  |  |  |
(Loss) income from operations | $ (1,236) | $ 6,787 | $ 6,268 | $ 14,093 | $ 1,096 | $ 9,403 | $ 12,896 | $ 21,276 | $ (726) | $ (486) | $ (1,300) | $ (468) | $ (1,606) | $ (2,130) | $ (5,328) | $ (6,715) |  |  |

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the types of products and services from which the reportable segment derives its revenue. + 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 + Details
Name: | us-gaap_DescriptionOfTypesOfProductsAndServicesFromWhichEachReportableSegmentDerivesItsRevenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + 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 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_GrossProfit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + 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 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration