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Goodwill and Other Intangible Assets | 3 Months Ended
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Apr. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets
| Weighted Average Life at 4/30/2019 |  | April 30, 2019 |  | January 31, 2019
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 |  |  | $ | — |  |  | $ | (4,529 | ) |  | $ | 2,531 |
Proprietary rights | 8.0 |  | $ | 9,296 |  |  | $ | (4,447 | ) |  | $ | — |  |  | $ | 4,849 |  |  | $ | 9,303 |  |  | $ | (4,292 | ) |  | $ | — |  |  | $ | 5,011 |
Customer relationships | 2.6 |  | 5,024 |  |  | (3,318 | ) |  | — |  |  | 1,706 |  |  | 5,024 |  |  | (3,147 | ) |  | — |  |  | 1,877 |
Patents | 5.2 |  | 2,440 |  |  | (1,090 | ) |  | — |  |  | 1,350 |  |  | 2,441 |  |  | (1,028 | ) |  | — |  |  | 1,413 |
Trade name | 7.1 |  | 894 |  |  | (55 | ) |  | — |  |  | 839 |  |  | 894 |  |  | (52 | ) |  | — |  |  | 842 |
Developed technology | 6.7 |  | 1,430 |  |  | (477 | ) |  | — |  |  | 953 |  |  | 1,430 |  |  | (441 | ) |  | — |  |  | 989 |
Other | 4.7 |  | 476 |  |  | (33 | ) |  | — |  |  | 443 |  |  | 385 |  |  | (22 | ) |  | — |  |  | 363 |
Amortizable intangible assets |  | $ | 19,560 |  |  | $ | (9,420 | ) |  | $ | — |  |  | $ | 10,140 |  |  | $ | 19,477 |  |  | $ | (8,982 | ) |  | $ | — |  |  | $ | 10,495 |
On January 31, 2019, the Company completed an annual review of goodwill and other intangible assets. Based on a review of qualitative factors it was determined it was more likely than not that the fair value of our Seamap reporting unit was greater than its carrying value. During the three months ended April 30, 2019 there have been no substantive indicators of impairment. Aggregate amortization expense was $454,000 and $447,000 for the three months ended April 30, 2019 and 2018, respectively. As of April 30, 2019, future estimated amortization expense related to amortizable intangible assets was estimated to be (in thousands):
For fiscal years ending January 31 |
2020 | $ | 1,437 |
2021 | 1,707 |
2022 | 1,199 |
2023 | 1,098 |
2024 | 894 |
Thereafter | 3,805 |
Total | $ | 10,140 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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