Segment Reporting - Financial Information by Business Segment (Revenues) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Segment Reporting Information [Line Items]
Revenues	$ 11,442	$ 15,681	$ 7,554	$ 17,142	$ 14,963	$ 22,906	$ 19,545	$ 25,732	$ 51,819	$ 83,146	$ 92,108
Interest income (expense), net									(725)	(673)	(10)
Operating (loss) income									(26,760)	(6,745)	5,805
Capital expenditures									2,509	19,900	44,058
Depreciation and amortization expense									32,111	36,986	31,037
Equipment Leasing [Member]
Segment Reporting Information [Line Items]
Revenues									26,665	52,836	55,549
Interest income (expense), net									(486)	(548)	(6)
Operating (loss) income									(27,156)	(8,766)	699
Capital expenditures									2,283	15,874	43,663
Depreciation and amortization expense									30,370	35,472	30,353
Equipment Manufacturing and Sales [Member]
Segment Reporting Information [Line Items]
Revenues									25,350	30,872	36,893
Interest income (expense), net									(239)	(125)	(4)
Operating (loss) income									279	2,178	5,055
Capital expenditures									226	4,026	395
Depreciation and amortization expense									$ 1,741	$ 1,514	$ 684