Balance Sheet Components - Intangible assets (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Intangible assets
Accumulated impairment		$ 0
Finite-lived intangible assets, net	$ 15,316,000
Total intangible assets, net	20,116,000	22,439,000
In process research and development
Intangible assets
Total intangible assets	4,800,000	4,800,000
Developed technology
Intangible assets
Total intangible assets	25,000,000	25,000,000
Accumulated amortization	(10,694,000)	(9,028,000)
Finite-lived intangible assets, net	14,306,000	15,972,000
Trademarks
Intangible assets
Total intangible assets	300,000	300,000
Accumulated amortization	(128,000)	(108,000)
Total intangible assets, net	172,000	192,000
Internal use software costs - registry
Intangible assets
Total intangible assets	1,236,000	1,236,000
Accumulated impairment	(371,000)
Accumulated amortization	(370,000)	(122,000)
Finite-lived intangible assets, net	495,000	1,114,000
Patents
Intangible assets
Total intangible assets	361,000	361,000
Accumulated amortization	(18,000)
Finite-lived intangible assets, net	$ 343,000	$ 361,000