CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
Cash and cash equivalents	$ 29,605	$ 38,547
Marketable securities	159,723	182,481
Accounts receivable	978	628
Inventories	2,163	2,374
Other current assets	4,882	5,195
Total current assets	197,351	229,225
Operating lease right-of-use assets	6,444	7,289
Property, plant and equipment, net	12,552	12,114
Intangible assets, net	2,400	2,625
Other noncurrent assets	6,062	6,132
Total assets	224,809	257,385
Liabilities and stockholders' equity
Accounts payable	3,424	3,602
Accrued liabilities	2,639	2,648
Accrued employee costs	2,443	6,043
Lease liability, current portion	3,681	3,587
Other current liabilities	4,406	2,524
Total current liabilities	16,593	18,404
Lease liability, noncurrent portion	2,807	3,767
Warrant liability	7,209	6,772
Total liabilities	26,609	28,943
Commitments and contingencies (Note 14)
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; 52,816and 52,389 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively	5	5
Additional paid-in capital	693,369	688,124
Accumulated other comprehensive loss	(248)	(87)
Accumulated deficit	(494,926)	(459,600)
Total stockholders' equity	198,200	228,442
Total liabilities and stockholders' equity	$ 224,809	$ 257,385