Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue:
Total revenue	$ 4,051	$ 3,072	$ 8,256	$ 6,138
Cost of revenue:
Total cost of revenue	1,940	1,341	4,084	3,046
Gross profit	2,111	1,731	4,172	3,092
Operating expenses:
Research and development	11,985	12,734	23,335	24,999
Selling, general and administrative	10,656	16,093	22,098	30,381
Total operating expenses	22,641	28,827	45,433	55,380
Loss from operations	(20,530)	(27,096)	(41,261)	(52,288)
Other income (expense):
Interest income	2,992	4,433	6,209	9,019
Loss on equity method investment	(1,841)	0	(3,416)	0
Other income (expense)	3	(187)	(755)	(260)
Total other income	1,154	4,246	2,038	8,759
Loss before provision for income taxes	(19,376)	(22,850)	(39,223)	(43,529)
Provision for income taxes	48	0	149	0
Net loss	(19,424)	(22,850)	(39,372)	(43,529)
Other comprehensive loss:
Unrealized gain (loss) on available-for-sale securities	2	(105)	171	(434)
Comprehensive loss	(19,422)	(22,955)	(39,201)	(43,963)
Nonrelated Party | Product
Revenue:
Total revenue	2,726	1,761	5,616	3,429
Cost of revenue:
Total cost of revenue	1,167	701	2,541	1,692
Nonrelated Party | Service
Revenue:
Total revenue	797	682	2,000	1,090
Cost of revenue:
Total cost of revenue	395	362	926	631
Nonrelated Party | Other
Revenue:
Total revenue	119	46	179	82
Cost of revenue:
Total cost of revenue	309	122	478	255
Related Party | Product
Revenue:
Total revenue	409	583	139	468
Cost of revenue:
Total cost of revenue	69	156	461	1,537
Class A and Class B Common Stockholder
Other income (expense):
Net loss	$ (19,424)	$ (22,850)	$ (39,372)	$ (43,529)
Other comprehensive loss:
Net loss per share attributable to common shareholders, basic (in usd per share)	$ (0.33)	$ (0.35)	$ (0.67)	$ (0.67)
Net loss per share attributable to common shareholders, diluted (in usd per share)	$ (0.33)	$ (0.35)	$ (0.67)	$ (0.67)
Weighted-average common shares outstanding, basic	58,087,565	64,576,399	58,744,490	64,581,228
Weighted-average common shares outstanding, diluted	58,087,565	64,576,399	58,744,490	64,581,228