Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue:
Total revenue	$ 4,121	$ 4,032	$ 12,377	$ 10,170
Cost of revenue:
Total cost of revenue	2,011	2,094	6,095	5,140
Gross profit	2,110	1,938	6,282	5,030
Operating expenses:
Research and development	10,797	12,967	34,132	37,966
Selling, general and administrative	10,659	13,296	32,757	43,677
Total operating expenses	21,456	26,263	66,889	81,643
Loss from operations	(19,346)	(24,325)	(60,607)	(76,613)
Other income (expense):
Interest income	2,765	4,082	8,974	13,101
Loss on equity method investment	(1,419)	(861)	(4,835)	(861)
Other expense	(210)	(224)	(965)	(484)
Total other income	1,136	2,997	3,174	11,756
Loss before provision for income taxes	(18,210)	(21,328)	(57,433)	(64,857)
Provision for income taxes	24	0	173	0
Net loss	(18,234)	(21,328)	(57,606)	(64,857)
Other comprehensive loss:
Unrealized gain on available-for-sale securities	124	1,415	295	981
Comprehensive loss	(18,110)	(19,913)	(57,311)	(63,876)
Nonrelated Party | Product
Revenue:
Total revenue	2,756	2,915	8,372	6,344
Cost of revenue:
Total cost of revenue	1,327	1,510	3,868	3,202
Nonrelated Party | Service
Revenue:
Total revenue	913	661	2,913	1,751
Cost of revenue:
Total cost of revenue	335	268	1,261	899
Nonrelated Party | Other
Revenue:
Total revenue	152	90	331	172
Cost of revenue:
Total cost of revenue	264	133	742	388
Related Party | Product
Revenue:
Total revenue	300	366	761	1,903
Cost of revenue:
Total cost of revenue	85	183	224	651
Class A and Class B Common Stockholder
Other income (expense):
Net loss	$ (18,234)	$ (21,328)	$ (57,606)	$ (64,857)
Other comprehensive loss:
Net loss per share attributable to common shareholders, basic (in usd per share)	$ (0.32)	$ (0.35)	$ (0.99)	$ (1.02)
Net loss per share attributable to common shareholders, diluted (in usd per share)	$ (0.32)	$ (0.35)	$ (0.99)	$ (1.02)
Weighted-average common shares outstanding, basic	56,312,290	61,186,324	57,928,898	63,441,333
Weighted-average common shares outstanding, diluted	56,312,290	61,186,324	57,928,898	63,441,333