Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 37,931	$ 40,753
Short-term investments	171,895	195,657
Other receivables	1,400	1,853
Inventory	7,512	7,436
Prepaid expenses and other current assets	2,586	3,248
Total current assets	225,638	253,323
Long-term investments	53,426	63,103
Operating lease right-of-use assets	21,657	22,791
Property and equipment, net	16,496	18,575
Restricted cash	524	524
Other assets	4,746	8,281
Total assets	322,487	366,597
Current liabilities:
Accounts payable	2,672	4,621
Accrued expenses	6,106	7,937
Deferred revenue	540	408
Operating lease liabilities, current	2,441	2,312
Other current liabilities	26	50
Total current liabilities	11,785	15,328
Operating lease liabilities, net of current portion	22,390	23,652
Other noncurrent liabilities	20	48
Total liabilities	34,195	39,028
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.00001 par value; 5,000,000 shares authorized as of June 30, 2025 and December 31, 2024; zero shares issued and outstanding as of June 30, 2025 and December 31, 2024	0	0
Additional paid-in capital	719,728	719,804
Accumulated other comprehensive gain	307	136
Accumulated deficit	(431,744)	(392,372)
Total stockholders’ equity	288,292	327,569
Total liabilities and stockholders’ equity	322,487	366,597
Class A common stock
Stockholders’ equity:
Common stock	1	1
Class B common stock
Stockholders’ equity:
Common stock	0	0
Nonrelated Party
Current assets:
Accounts receivable, net	3,905	3,997
Related Party
Current assets:
Accounts receivable, net	$ 409	$ 379