CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
Cash and cash equivalents	$ 40,550	$ 67,420
Marketable securities	193,141	256,392
Accounts receivable	769	2,887
Inventories	2,692	2,951
Other current assets	5,620	5,473
Total current assets	242,772	335,123
Operating lease right-of-use assets	7,770	7,402
Property, plant and equipment, net	11,199	9,720
Intangible assets, net	2,850	3,525
Other noncurrent assets	1,067	862
Total assets	265,658	356,632
Liabilities and stockholders' equity
Accounts payable	3,306	5,182
Accrued liabilities	2,772	9,063
Accrued employee costs	4,860	4,721
Lease liability, current portion	3,347	2,667
Other current liabilities	444	194
Total current liabilities	14,729	21,827
Lease liability, noncurrent portion	4,501	4,789
Warrant liability	22	90
Total liabilities	19,252	26,706
Commitments and contingencies (Note 12)
Convertible preferred stock $0.0001 par value; 10,000 shares authorized; no,shares issued and outstanding	0	0
Stockholders' Deficit
Common stock $0.0001 par value; 422,000 shares authorized; 223,167and 218,748 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively	22	22
Additional paid-in capital	661,999	643,756
Accumulated other comprehensive loss	(981)	(3,585)
Accumulated deficit	(414,634)	(310,267)
Total stockholders' equity	246,406	329,926
Total liabilities and stockholders' equity	$ 265,658	$ 356,632