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Goodwill and Acquired Intangible Assets | 3 Months Ended
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Apr. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Acquired Intangible Assets | Goodwill and Acquired Intangible Assets There have been no changes in the carrying amount of goodwill since January 31, 2021. Acquired intangible assets subject to amortization as of April 30, 2021 were as follows:
|  | Cost |  | Accumulated Amortization |  | Net |  | Weighted Average Remaining Useful Life
|  | (in thousands) |  | (in years)
Customer relationships |  | $ | 21,800 |  |  | $ | (1,272) |  |  | $ | 20,528 |  |  | 9.4
Developed technology |  | 5,600 |  |  | (653) |  |  | 4,947 |  |  | 4.4
Trademarks |  | 400 |  |  | (117) |  |  | 283 |  |  | 1.4
Total acquired intangibles, net |  | $ | 27,800 |  |  | $ | (2,042) |  |  | $ | 25,758 |  |  |
For the three months ended April 30, 2021, amortization expense related to acquired intangible assets was $0.9 million. No amortization expense was recorded during the three months ended April 30, 2020.

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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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