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Significant accounting policies Investment in joint venture (Tables) | 12 Months Ended
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Jan. 31, 2013
Investment in joint venture [Abstract] |
Schedule of Equity Method Investments [Table Text Block] | Investment in joint venture. In October 2009, the Company invested $5.9 million, which consisted of $2 million for a 49% interest and $3.9 million for a note receivable, in a Canadian joint venture with The Bayou Companies, Inc., a subsidiary of Aegion Corporation. The joint venture completed an acquisition of Garneau, Inc's pipe coating and insulation facility and associated assets located in Camrose, Alberta, Canada, which provides the Company the opportunity to participate in the growing oil sands market. In February 2012, the Company loaned $1 million to its Canadian joint venture to be used for capital expenditures. The Company accounts for the investment in joint venture using the equity method. The financial results included in the Company's consolidated financial statements.
| 2012 | 2011
Share of income from joint venture | $1,386 | $1,558
The following information summarizes the joint venture financial data as of January 31:
| 2012 |  | 2011 |
Current assets | $14,058 | $14,381
Noncurrent assets | 19,442 |  | 14,259 |
Current liabilities | 2,703 |  | 3,449 |
Noncurrent liabilities | 18,274 |  | 15,403 |
Equity | 12,524 |  | 9,789 |
Revenue | 30,448 |  | 29,010 |
Gross profit | 7,211 |  | 7,565 |
Income from continuing operations | 3,380 |  | 5,137 |
Net income | $2,680 | $3,189
| 2012 | 2011
Share of income from joint venture | $1,386 | $1,558
The following information summarizes the joint venture financial data as of January 31:
| 2012 |  | 2011 |
Current assets | $14,058 | $14,381
Noncurrent assets | 19,442 |  | 14,259 |
Current liabilities | 2,703 |  | 3,449 |
Noncurrent liabilities | 18,274 |  | 15,403 |
Equity | 12,524 |  | 9,789 |
Revenue | 30,448 |  | 29,010 |
Gross profit | 7,211 |  | 7,565 |
Income from continuing operations | 3,380 |  | 5,137 |
Net income | $2,680 | $3,189

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- Definition Tabular disclosure of equity method investments in common stock. The disclosure may include: (a) the name of each investee or group of investments for which combined disclosure is appropriate, (2) the percentage ownership of common stock, (3) the difference, if any, between the carrying amount of an investment and the value of the underlying equity in the net assets and the accounting treatment of difference, if any, and (4) the aggregate value of each identified investment based on its quoted market price, if available. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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