Segment Reporting - Reconciliation of Operating Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Segment Reporting Information [Line Items]
Consolidated operating income	$ (31,290)	$ (26,760)	$ (6,745)
Equipment Leasing [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	(27,782)	(23,454)	(4,922)
Equipment Manufacturing and Sales [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	(508)	279	2,178
Operating Segments [Member] | Equipment Leasing [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	(27,782)	(23,454)	(4,922)
Operating Segments [Member] | Equipment Manufacturing and Sales [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	(508)	279	2,178
Eliminations [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	1	117	(157)
Corporate Expenses [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	$ (3,001)	$ (3,702)	$ (3,844)