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Goodwill and Acquired Intangible Assets, Net
 9 Months Ended
Oct. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Acquired Intangible Assets, Net Goodwill and Acquired Intangible Assets, Net
There were no material changes to goodwill carrying amounts during the nine months ended October 31, 2022. The gross carrying amounts and accumulated amortization of the Company’s intangible assets were as follows (in thousands):
October 31, 2022
Gross Carrying ValueAccumulated AmortizationNet Book ValueWeighted-Average Remaining Useful Life
(in years)
Developed technology$38,100 $(27,587)$10,513 1.9
Customer relationships15,200 (11,990)3,210 1.1
Total$53,300 $(39,577)$13,723 
January 31, 2022
Gross Carrying ValueAccumulated AmortizationNet Book ValueWeighted-Average Remaining Useful Life
(in years)
Developed technology$38,100 $(22,982)$15,118 2.6
Customer relationships15,200 (9,710)5,490 1.8
Total$53,300 $(32,692)$20,608 
Acquired intangible assets are amortized on a straight-line basis. Amortization expense of intangible assets was $2.3 million and $6.9 million for the three and nine months ended October 31, 2022, respectively, and $2.3 million and $6.8 million for the three and nine months ended October 31, 2021, respectively. Amortization expense for developed technology was included as research and development expense in the Company’s condensed consolidated statements of operations. Amortization expense for customer relationships was included as sales and marketing expense in the Company’s interim unaudited condensed consolidated statements of operations.
As of October 31, 2022, future amortization expense related to the intangible assets is as follows (in thousands):
Years Ending January 31,
Remainder of 2023$2,295 
20248,505 
20252,130 
2026680 
2027113 
Total$13,723