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Sale of Subsidiaries (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended | 15 Months Ended
--- | --- | --- | --- | ---
Feb. 28, 2019 USD ($) | Aug. 31, 2018 USD ($) payment | Oct. 31, 2019 USD ($) | Oct. 31, 2018 USD ($) | Oct. 31, 2019 USD ($) | Oct. 31, 2018 USD ($) | Oct. 31, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Loss on sale subsidiary |  |  | $ 0 | $ 4,905 | $ 0 | $ 4,905 |
Cumulative translation loss |  |  | $ 0 | $ 5,355 | $ 0 | $ 5,355 |
Seismic Asia Pacific Pty Ltd | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Proceeds from sale of subsidiary | $ 660 |  |  |  |  |  |
Proceeds in cash from sale of subsidiary | $ 240 |  |  |  |  |  |
Note receivable term (in years) | 2 years |  |  |  |  |  |
Proceeds in note receivable from sale of subsidiary | $ 420 |  |  |  |  |  |
Working capital adjustment | $ 114 |  |  |  |  |  |
Mitcham Seismic Eurasia LLC | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Proceeds from sale of subsidiary |  | $ 1,200 |  |  |  |  |
Proceeds in cash from sale of subsidiary |  |  |  |  |  |  | $ 555
Number of payments | payment |  | 8 |  |  |  |  |
Interest rate on payments due from sale of subsidiary |  | 9.00% |  |  |  |  |
Loss on sale subsidiary |  | $ 4,900 |  |  |  |  |
Cumulative translation loss |  | $ 5,400 |  |  |  |  |

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