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Intangible Assets and Goodwill
 9 Months Ended
Oct. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets and Goodwill Intangible Assets and Goodwill
Intangible Assets
Intangible assets, net consisted of the following (in thousands):
October 31, 2021January 31, 2021
Finite-lived intangible assets
Assembled workforce$15,099 $— 
Developed technology11,332 11,332 
Patents8,174 7,948 
Other47 47 
Total finite-lived intangible assets34,652 19,327 
Less: accumulated amortization(9,311)(3,662)
Total finite-lived intangible assets, net25,341 15,665 
Infinite-lived intangible assets - trademarks826 426 
Total intangible assets, net$26,167 $16,091 

During the nine months ended October 31, 2021, the Company acquired $15.1 million of assembled workforce assets with a useful life of four years, $0.4 million of infinite-lived trademark intangible assets, and $0.2 million of patents with a useful life of four years.

Amortization expense of intangible assets was $1.9 million and $5.7 million for the three and nine months ended October 31, 2021, respectively, and $0.9 million and $1.9 million for the three and nine months ended October 31, 2020, respectively.

As of October 31, 2021, future amortization expense is expected to be as follows (in thousands):
Amount
Fiscal Year Ending January 31,
Remainder of 2022$1,922 
20237,687 
20247,687 
20256,838 
20261,207 
Total
$25,341 
Goodwill
As of October 31, 2021 and January 31, 2021, goodwill was $8.4 million. No goodwill impairments were recorded for each of the three and nine months ended October 31, 2021 and 2020.