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Segment Reporting - Financial Information by Business Segment (Revenues) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2019 | Oct. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |
Revenues | $ 10,663 | $ 14,651 | $ 29,418 | $ 30,614
Operating (loss) income | (1,929) | (349) | (7,447) | (10,497)
(Loss) income before taxes | (1,968) | (5,440) | (7,416) | (15,412)
Operating Segments | Marine technology products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 8,065 | 9,305 | 20,792 | 19,025
Operating (loss) income | (227) | 876 | (2,106) | (2,515)
(Loss) income before taxes | (289) | 881 | (2,071) | (2,441)
Operating Segments | Equipment leasing |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 2,622 | 5,386 | 8,732 | 11,906
Operating (loss) income | (745) | (347) | (2,685) | (5,369)
(Loss) income before taxes | (722) | (5,443) | (2,689) | (10,359)
Corporate expenses |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
Operating (loss) income | (957) | (864) | (2,656) | (2,599)
(Loss) income before taxes | (957) | (864) | (2,656) | (2,599)
Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | (24) | (40) | (106) | (317)
Operating (loss) income | 0 | (14) | 0 | (14)
(Loss) income before taxes | $ 0 | $ (14) | $ 0 | $ (13)

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