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Seismic Equipment Lease Pool and Property and Equipment - Schedule of Seismic Equipment Lease Pool and Property and Equipment (Detail) - USD ($) $ in Thousands | Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018
--- | --- | --- | ---
Property, Plant and Equipment [Line Items] |  |  |
Cost of property and equipment | $ 15,365 | $ 14,509 |
Cost of seismic equipment lease pool and property and equipment | 160,499 | 162,028 |
Less accumulated depreciation | (146,722) | (147,873) |
Net book value of seismic equipment lease pool and property and equipment | 13,777 | 14,155 | $ 22,900
Recording channels |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Cost of property and equipment | 80,378 | 84,207 |
Other peripheral equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Cost of property and equipment | 64,756 | 63,312 |
Cost of seismic equipment lease pool |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Cost of property and equipment | 145,134 | 147,519 |
Land and buildings |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Cost of property and equipment | 4,274 | 4,041 |
Furniture and fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Cost of property and equipment | 10,530 | 9,897 |
Autos and trucks |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Cost of property and equipment | $ 561 | $ 571 |

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