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v3.20.1

Segment Reporting - Financial Information by Business Segment (Revenues) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2020 | Oct. 31, 2019 | Jul. 31, 2019 | Apr. 30, 2019 | Jan. 31, 2019 | Oct. 31, 2018 | Jul. 31, 2018 | Apr. 30, 2018 | Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 13,257 | $ 10,663 | $ 8,898 | $ 9,857 | $ 12,328 | $ 14,651 | $ 8,350 | $ 7,613 | $ 42,675 | $ 42,942 | $ 48,276
Interest expense, net |  |  |  |  |  |  |  |  | (46) | 72 | 47
Operating loss |  |  |  |  |  |  |  |  | (10,375) | (13,020) | (19,708)
Capital expenditures |  |  |  |  |  |  |  |  | 3,991 | 2,531 | 1,316
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 7,768 | 11,814 | 16,637
Corporate expenses |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest expense, net |  |  |  |  |  |  |  |  | 0 | 0 | 0
Operating loss |  |  |  |  |  |  |  |  | (3,471) | (3,375) | (3,211)
Capital expenditures |  |  |  |  |  |  |  |  | 0 | 0 | 0
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 0 | 0 | 0
Marine Technology Products | Operating segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 29,572 | 25,768 | 27,572
Interest expense, net |  |  |  |  |  |  |  |  | 1 | 0 | (18)
Operating loss |  |  |  |  |  |  |  |  | (2,259) | (3,780) | (2,572)
Capital expenditures |  |  |  |  |  |  |  |  | 894 | 583 | 268
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 2,649 | 2,418 | 1,991
Equipment Leasing | Operating segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 13,213 | 17,383 | 20,919
Interest expense, net |  |  |  |  |  |  |  |  | (47) | 72 | 65
Operating loss |  |  |  |  |  |  |  |  | (4,667) | (5,872) | (13,930)
Capital expenditures |  |  |  |  |  |  |  |  | 3,097 | 1,948 | 1,048
Depreciation and amortization expense |  |  |  |  |  |  |  |  | $ 5,141 | $ 9,402 | $ 14,652

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