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Acquisition - Additional Information (Detail) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
May. 31, 2014 USD ($) Product_Lines | Jan. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Jan. 31, 2016 USD ($) | Oct. 31, 2015 USD ($) | Jul. 31, 2015 USD ($) | Apr. 30, 2015 USD ($) | Jan. 31, 2015 USD ($) | Oct. 31, 2014 USD ($) | Jul. 31, 2014 USD ($) | Apr. 30, 2014 USD ($) | Jan. 31, 2016 USD ($) | Jan. 31, 2015 USD ($) | Jan. 31, 2014 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, cash paid |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000 | $ 14,500,000 |
Revenue |  |  |  | $ 11,442,000 | $ 15,681,000 | $ 7,554,000 | $ 17,142,000 | $ 14,963,000 | $ 22,906,000 | $ 19,545,000 | $ 25,732,000 | 51,819,000 | 83,146,000 | $ 92,108,000
Net income |  |  |  | $ (26,838,000) | $ (5,813,000) | $ (5,848,000) | $ (237,000) | $ (9,185,000) | $ (397,000) | $ (3,347,000) | $ 3,737,000 | $ (38,736,000) | (9,192,000) | 4,768,000
Other Intangible Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Remaining Life |  |  |  |  |  |  |  |  |  |  |  | 9 years 6 months |  |
Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Remaining Life |  |  |  |  |  |  |  |  |  |  |  | 59 months 18 days |  |
Patents [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Remaining Life |  |  |  |  |  |  |  |  |  |  |  | 6 years 9 months 18 days |  |
Trade Name [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets amount |  |  |  |  |  |  |  |  |  |  |  | $ 760,000 |  |
Equipment Manufacturing and Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  | $ 25,350,000 | $ 30,872,000 | $ 36,893,000
Klein Associates Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  | $ 533,000 |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ 5,000 |  |  |  |  |  |  |  |  |  |  |  |
Klein Associates Inc. [Member] | Inventory [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, fair value consideration |  |  | $ 3,300,000 |  |  |  |  |  |  |  |  |  |  |
Klein Associates Inc. [Member] | Equipment Manufacturing and Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, cash paid |  |  | $ 10,000,000 |  |  |  |  |  |  |  |  |  |  |
Seamap Singapore [Member] | ION Geophysical Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, cash paid | $ 14,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, credit | $ 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of product lines | Product_Lines | 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, fair value consideration | $ 15,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Seamap Singapore [Member] | ION Geophysical Corporation [Member] | Furniture and Fixtures [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, fair value consideration | 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Seamap Singapore [Member] | ION Geophysical Corporation [Member] | Amortizable Intangible Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, fair value consideration | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Seamap Singapore [Member] | ION Geophysical Corporation [Member] | Amortizable Intangible Assets [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, fair value consideration | 5,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Seamap Singapore [Member] | ION Geophysical Corporation [Member] | Amortizable Intangible Assets [Member] | Property Rights [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, fair value consideration | 2,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Seamap Singapore [Member] | ION Geophysical Corporation [Member] | Amortizable Intangible Assets [Member] | Patents [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, fair value consideration | 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Seamap Singapore [Member] | ION Geophysical Corporation [Member] | Inventory [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, fair value consideration | 3,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Seamap Singapore [Member] | ION Geophysical Corporation [Member] | Goodwill [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, fair value consideration | $ 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |

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