Segment Reporting - Financial Information by Business Segment (Assets) (Detail) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Segment Reporting Information [Line Items]
Fixed assets, net	$ 43,838	$ 73,516	$ 100,087
Intangible assets, net	9,012	10,466	10,831
Goodwill	3,997	4,155	5,594
Total Assets	94,714	134,759	179,611
Equipment Leasing [Member]
Segment Reporting Information [Line Items]
Fixed assets, net	39,926	69,238	98,964
Intangible assets, net			1,006
Total Assets	57,544	95,932	148,985
Equipment Manufacturing and Sales [Member]
Segment Reporting Information [Line Items]
Fixed assets, net	4,036	4,278	1,123
Intangible assets, net	9,012	10,466	9,825
Goodwill	3,997	4,155	5,594
Total Assets	$ 37,294	$ 39,059	$ 30,982