Intangible assets, net	3 Months Ended
Mar. 31, 2023
Intangible assets, net
Intangible assets, net	6.Intangible assets, net The gross amount of amortizable intangible assets, consisting of developed technology, was $31.6 million and $31.6 million as of March 31, 2023 and December 31 2022, respectively, and accumulated amortization was $4.1 million and $3.3 million as of March 31, 2023 and December 31, 2022, respectively. The amortization expense for the three months ended March 31, 2023 was $0.8 million (three months ended March 31, 2022: $0.8 million). The estimated annual amortization expense is $3.1 million for the years 2023 through to 2031.

Intangible assets, net

3 Months Ended

Mar. 31, 2023

6.Intangible assets, net

The gross amount of amortizable intangible assets, consisting of developed technology, was $31.6 million and $31.6 million as of March 31, 2023 and December 31 2022, respectively, and accumulated amortization was $4.1 million and $3.3 million as of March 31, 2023 and December 31, 2022, respectively. The amortization expense for the three months ended March 31, 2023 was $0.8 million (three months ended March 31, 2022: $0.8 million). The estimated annual amortization expense is $3.1 million for the years 2023 through to 2031.