Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Revenue:
Total revenue	$ 14,170	$ 16,661
Cost of revenue:
Total cost of revenue	7,115	8,155
Gross profit	7,055	8,506
Operating expenses:
Research and development	50,585	53,019
Selling, general and administrative	56,571	58,950
Total operating expenses	107,156	111,969
Loss from operations	(100,101)	(103,463)
Other income (expense):
Interest income	16,666	17,764
Loss on equity method investment	(2,649)	0
Other expense	(417)	(578)
Total other income	13,600	17,186
Loss before provision for income taxes	(86,501)	(86,277)
Provision for income taxes	98	0
Net loss	(86,599)	(86,277)
Other comprehensive loss:
Unrealized gain on available-for-sale securities	328	1,059
Comprehensive loss	(86,271)	(85,218)
Nonrelated Party | Product
Revenue:
Total revenue	8,695	8,506
Cost of revenue:
Total cost of revenue	4,402	5,398
Nonrelated Party | Service
Revenue:
Total revenue	2,960	2,016
Cost of revenue:
Total cost of revenue	1,465	685
Nonrelated Party | Grant and other
Revenue:
Total revenue	223	1,479
Cost of revenue:
Total cost of revenue	536	642
Related Party | Product
Revenue:
Total revenue	2,292	4,660
Cost of revenue:
Total cost of revenue	712	1,430
Class A and Class B Common Stockholder
Other income (expense):
Net loss	$ (86,599)	$ (86,277)
Other comprehensive loss:
Net loss per share attributable to common shareholders, basic (in usd per share)	$ (1.39)	$ (1.35)
Net loss per share attributable to common shareholders, diluted (in usd per share)	$ (1.39)	$ (1.35)
Weighted-average common shares outstanding, basic	62,348,012	63,850,490
Weighted-average common shares outstanding, diluted	62,348,012	63,850,490