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Investment in joint venture (Notes) | 9 Months Ended
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Oct. 31, 2015
Schedule of Equity Method Investments [Line Items] |
Equity Method Investments and Joint Ventures Disclosure [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 operates in Camrose, Alberta, Canada, which provides the Company the opportunity to participate in the oil sands market. During the first six months of 2015, the Company received $1.9 million in principal repayments on the note receivable. The Company accounts for the investment in the joint venture using the equity method. The financial results are included in the Company's consolidated financial statements.
| Three Months Ended October 31, | Nine Months Ended October 31,
| 2015 |  | 2014 |  | 2015 |  | 2014 |
Share of income from joint venture |  | $408 |  |  | $903 |  |  | $524 |  |  | $1,114 |
The following information summarizes the joint venture financial data as of October 31, 2015 and January 31, 2015, respectively:
| October 31, 2015 |  | January 31, 2015 |
Current assets | $11,008 | $13,820
Noncurrent assets | 13,366 |  | 14,023 |
Current liabilities | 5,127 |  | 4,499 |
Noncurrent liabilities | 4,220 |  | 9,013 |
Equity | 15,027 |  | 14,331 |
| Three Months Ended October 31, | Nine Months Ended October 31,
| 2015 |  | 2014 |  | 2015 |  | 2014 |
Revenue |  | $8,780 |  |  | $11,886 |  |  | $18,922 |  |  | $28,666 |
Gross profit | 1,603 |  | 3,310 |  | 3,082 |  | 5,426 |
Income from continuing operations | 1,257 |  | 2,749 |  | 1,823 |  | 3,820 |
Net income | 833 |  | 1,843 |  | 1,070 |  | 2,274 |

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- Definition The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group. + 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 FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=49116238&loc=d3e32847-111569 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=49116238&loc=d3e32787-111569 + Details
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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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