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Discontinued operations Discontinued financials (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2017 | Oct. 31, 2016 | Jan. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Disposal Group, Including Discontinued Operation, Revenue | $ 0 | $ 0 | $ 0 | $ 10,467 |
(Loss) gain on disposal of discontinued operations | 0 | (2,204) | 0 | 268 |
Income from discontinued operations | 0 | 1,876 | 0 | 1,216 |
(Loss) income from discontinued operations before income tax | 0 | (328) | 0 | 1,484 |
Discontinued operation, income tax (benefit) expense | 0 | (125) | 0 | 578 |
(Loss) income from discontinued operations, net of tax | 0 | $ (203) | 0 | 906 |
Disposal Group, Including Discontinued Operation, accounts receivable | 0 |  | 0 |  | $ 25
Disposal Group, Including Discontinued Operation, Assets | 0 |  | 0 |  | 25
Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities | 138 |  | 138 |  | 199
Disposal Group, Including Discontinued Operation, Liabilities | $ 138 |  | 138 |  | $ 199
Net cash used in discontinued operating activities |  |  | (36) | (673) |
Net cash provided by discontinued investing activities |  |  | 0 | 9,606 |
Net cash used in discontinued financing activities |  |  | $ 0 | $ (8,933) |

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- Definition Amount of cash inflow (outflow) of financing activities of discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 + Details
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- Definition Amount of cash inflow (outflow) of investing activities of discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 + Details
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