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Segment Reporting - Financial Information by Business Segment (Revenues) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2017 | Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2016 | Jan. 31, 2016 | Oct. 31, 2015 | Jul. 31, 2015 | Apr. 30, 2015 | Jan. 31, 2017 | Jan. 31, 2016 | Jan. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 12,548 | $ 8,057 | $ 8,663 | $ 11,731 | $ 11,442 | $ 15,681 | $ 7,554 | $ 17,142 | $ 40,999 | $ 51,819 | $ 83,146
Interest expense, net |  |  |  |  |  |  |  |  | (643) | (725) | (673)
Operating (loss) income |  |  |  |  |  |  |  |  | (31,290) | (26,760) | (6,745)
Capital expenditures |  |  |  |  |  |  |  |  | 283 | 2,509 | 19,900
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 28,275 | 32,111 | 36,986
Corporate Expenses [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating (loss) income |  |  |  |  |  |  |  |  | (3,001) | (3,702) | (3,844)
Equipment Leasing [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 15,941 | 26,665 | 52,836
Interest expense, net |  |  |  |  |  |  |  |  | (465) | (486) | (548)
Operating (loss) income |  |  |  |  |  |  |  |  | (27,782) | (23,454) | (4,922)
Capital expenditures |  |  |  |  |  |  |  |  | 20 | 2,283 | 15,874
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 26,221 | 30,370 | 35,472
Equipment Manufacturing and Sales [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 25,100 | 25,350 | 30,872
Interest expense, net |  |  |  |  |  |  |  |  | (178) | (239) | (125)
Operating (loss) income |  |  |  |  |  |  |  |  | (508) | 279 | 2,178
Capital expenditures |  |  |  |  |  |  |  |  | 263 | 226 | 4,026
Depreciation and amortization expense |  |  |  |  |  |  |  |  | $ 2,054 | $ 1,741 | $ 1,514

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