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Goodwill and Other Intangible Assets - Schedule of Net Carrying Amount (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Apr. 30, 2019 | Jan. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |  |
Goodwill, Gross Carrying Amount | $ 7,060 | $ 7,060
Goodwill, Impairment | (4,529) | (4,529)
Goodwill, Net Carrying Amount | 2,531 | 2,531
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 19,560 | 19,477
Accumulated Amortization | (9,420) | (8,982)
Net Carrying Amount | $ 10,140 | 10,495
Proprietary rights |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 8 years |
Gross Carrying Amount | $ 9,296 | 9,303
Accumulated Amortization | (4,447) | (4,292)
Net Carrying Amount | $ 4,849 | 5,011
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 2 years 7 months 1 day |
Gross Carrying Amount | $ 5,024 | 5,024
Accumulated Amortization | (3,318) | (3,147)
Net Carrying Amount | $ 1,706 | 1,877
Patents |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 5 years 2 months 24 days |
Gross Carrying Amount | $ 2,440 | 2,441
Accumulated Amortization | (1,090) | (1,028)
Net Carrying Amount | $ 1,350 | 1,413
Trade name |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 7 years 1 month 18 days |
Gross Carrying Amount | $ 894 | 894
Accumulated Amortization | (55) | (52)
Net Carrying Amount | $ 839 | 842
Developed technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 6 years 8 months 2 days |
Gross Carrying Amount | $ 1,430 | 1,430
Accumulated Amortization | (477) | (441)
Net Carrying Amount | $ 953 | 989
Other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 4 years 8 months 2 days |
Gross Carrying Amount | $ 476 | 385
Accumulated Amortization | (33) | (22)
Net Carrying Amount | $ 443 | $ 363

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