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Seismic Equipment Lease Pool and Property and Equipment (Tables)
 12 Months Ended
Jan. 31, 2018
Property, Plant and Equipment [Abstract]  
Schedule of Seismic Equipment Lease Pool and Property and Equipment
Seismic equipment lease pool and property and equipment consisted of the following (in thousands)
 
As of January 31,
 
2018
 
2017
Recording channels
$
89,397

 
$
126,081

Other peripheral equipment
84,877

 
92,920

Cost of seismic equipment lease pool
174,274

 
219,001

Land and buildings
3,380

 
3,379

Furniture and fixtures
10,222

 
9,462

Autos and trucks
722

 
675

Cost of property and equipment
14,324

 
13,516

Cost of seismic equipment lease pool and property and equipment
188,598

 
232,517

Less accumulated depreciation
(165,698
)
 
(188,679
)
Net book value of seismic equipment lease pool and property and equipment
$
22,900

 
$
43,838
Location of Seismic Equipment Lease Pool and Property and Equipment
Location of seismic equipment lease pool and property and equipment (in thousands):
 
As of January 31,
 
2018
 
2017
United States
$
4,973

 
$
16,510

Europe
6,557

 
7,730

Canada
2,134

 
8,525

Latin America
2,390

 
2,317

Singapore
4,793

 
5,321

Australia
737

 
1,462

Russia
1,316

 
1,973

Net book value of seismic equipment lease pool and property and equipment
$
22,900

 
$
43,838