Seismic Equipment Lease Pool and Property and Equipment - Location of Seismic Equipment Lease Pool and Property and Equipment (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Geographic Information For Property Plant And Equipment [Line Items]
Seismic equipment lease pool and property and equipment, net	$ 73,516	$ 100,087	$ 129,573
United States [Member]
Geographic Information For Property Plant And Equipment [Line Items]
Seismic equipment lease pool and property and equipment, net	26,913	43,541
Canada [Member]
Geographic Information For Property Plant And Equipment [Line Items]
Seismic equipment lease pool and property and equipment, net	13,985	22,451
Latin America [Member]
Geographic Information For Property Plant And Equipment [Line Items]
Seismic equipment lease pool and property and equipment, net	3,074	7,519
Australia [Member]
Geographic Information For Property Plant And Equipment [Line Items]
Seismic equipment lease pool and property and equipment, net	2,611	4,600
Russia [Member]
Geographic Information For Property Plant And Equipment [Line Items]
Seismic equipment lease pool and property and equipment, net	2,026	2,698
Singapore [Member]
Geographic Information For Property Plant And Equipment [Line Items]
Seismic equipment lease pool and property and equipment, net	6,408	6,627
United Kingdom [Member]
Geographic Information For Property Plant And Equipment [Line Items]
Seismic equipment lease pool and property and equipment, net	96	125
Europe [Member]
Geographic Information For Property Plant And Equipment [Line Items]
Seismic equipment lease pool and property and equipment, net	$ 18,403	$ 12,526