Segment Reporting - Reconciliation of Operating Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Segment Reporting Information [Line Items]
Consolidated operating income	$ (26,760)	$ (6,745)	$ 5,805
Equipment Leasing [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	(27,156)	(8,766)	699
Equipment Manufacturing and Sales [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	279	2,178	5,055
Operating Segments [Member] | Equipment Leasing [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	(27,156)	(8,766)	699
Operating Segments [Member] | Equipment Manufacturing and Sales [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	279	2,178	5,055
Intersegment Sales Elimination [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	$ 117	$ (157)	$ 51