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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Jan. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets |
| Weighted Average Life at 1/31/18 |  | January 31, 2018 |  | January 31, 2017
Gross Carrying Amount |  | Accumulated Amortization |  | Impairment |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Impairment |  | Net Carrying Amount
|  |  | (in thousands) |  | (in thousands)
Goodwill |  |  | $ | 7,060 |  |  | $ | — |  |  | $ | (4,529 | ) |  | $ | 2,531 |  |  | $ | 7,060 |  |  | $ | — |  |  | $ | (3,063 | ) |  | $ | 3,997 |
Proprietary rights | 4.9 |  | $ | 6,181 |  |  | $ | (3,663 | ) |  | — |  |  | 2,518 |  |  | $ | 5,810 |  |  | $ | (3,003 | ) |  | — |  |  | 2,807 |
Customer relationships | 3.8 |  | 5,024 |  |  | (2,464 | ) |  | — |  |  | 2,560 |  |  | 4,679 |  |  | (1,656 | ) |  | — |  |  | 3,023 |
Patents | 5.0 |  | 1,730 |  |  | (778 | ) |  | — |  |  | 952 |  |  | 1,608 |  |  | (558 | ) |  | — |  |  | 1,050 |
Trade name | 8.3 |  | 894 |  |  | (41 | ) |  | — |  |  | 853 |  |  | 884 |  |  | (27 | ) |  | — |  |  | 857 |
Developed technology | 7.9 |  | 1,430 |  |  | (298 | ) |  | — |  |  | 1,132 |  |  | 1,430 |  |  | (155 | ) |  | — |  |  | 1,275 |
Amortizable intangible assets |  | $ | 15,259 |  |  | $ | (7,244 | ) |  | $ | — |  |  | $ | 8,015 |  |  | $ | 14,411 |  |  | $ | (5,399 | ) |  | $ | — |  |  | $ | 9,012 |
Future Estimated Amortization Expense Related to Amortizable Intangible Assets | As of January 31, 2018, future estimated amortization expense related to amortizable intangible assets is estimated to be (in thousands):
For fiscal years ending January 31: |
2019 | $ | 1,508 |
2020 | 1,508 |
2021 | 1,355 |
2022 | 820 |
2023 | 726 |
Thereafter | 2,098 |
Total | $ | 8,015 |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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