Intangible Assets

12 Months Ended

Jan. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

Intangible assets consisted of the following (in thousands):

	As of January 31,
	2022		2023
Intellectual property excluding patents	$	2,458	$	2,458
Patents	950		950
	3,408		3,408
Less accumulated amortization	(533)		(614)
	$	2,875	$	2,794

Amortization expense related to intangible assets was $0.6 million, $0.5 million and $0.1 million for the years ended January 31, 2021, 2022 and 2023, respectively. Intellectual property excluding patents is considered an indefinite-lived asset due to the fact that it is renewable in perpetuity. The patents were acquired and are being amortized over a weighted-average remaining useful life of approximately 4.2 years.

As of January 31, 2023, future amortization expense for definite-lived intangible assets is estimated to be as follows (in thousands):

Year Ending January 31,
2024	$	80
2025	80
2026	80
2027	75
2028	11
Thereafter	10
	$	336