CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets
Cash and cash equivalents	$ 38,547	$ 67,420
Marketable securities	182,481	256,392
Accounts receivable	628	2,887
Inventories	2,374	2,951
Other current assets	5,195	5,473
Total current assets	229,225	335,123
Operating lease right-of-use assets	7,289	7,402
Property, plant, and equipment, net	12,114	9,720
Intangible assets, net	2,625	3,525
Other noncurrent assets	6,132	862
Total assets	257,385	356,632
Liabilities and stockholders' equity
Accounts payable	3,602	5,182
Accrued liabilities	2,648	9,063
Accrued employee costs	6,043	4,721
Lease liability, current portion	3,587	2,667
Other current liabilities	2,524	194
Total current liabilities	18,404	21,827
Lease liability, noncurrent portion	3,767	4,789
Warrant liabilities	6,772	90
Total liabilities	28,943	26,706
Commitments and contingencies (Note 15)
Preferred stock $0.0001 par value, 10,000 shares authorized; no shares issued and outstanding as of December 31, 2023 and December 31, 2022	0	0
Stockholders' Equity
Common stock $0.0001 par value; 422,000 shares authorized; 261,945 and 218,748 shares issued and outstanding at December 31, 2023 and December 31, 2022, respectively	26	22
Additional paid-in capital	688,103	643,756
Accumulated other comprehensive loss	(87)	(3,585)
Accumulated deficit	(459,600)	(310,267)
Total stockholders' equity	228,442	329,926
Total liabilities and stockholders' equity	$ 257,385	$ 356,632