CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets
Cash and cash equivalents	$ 62,499	$ 66,810
Marketable securities	351,988	378,200
Accounts receivable	211	2,341
Inventories	1,926	2,063
Other current assets	8,667	9,070
Total current assets	425,291	458,484
Operating lease right-of-use assets	9,577	10,284
Property, plant and equipment, net	7,279	5,136
Intangible assets, net	4,200	4,425
Other noncurrent assets	860	859
Total assets	447,207	479,188
Liabilities, convertible preferred stock and stockholders' equity
Accounts payable	6,645	4,386
Accrued liabilities	2,671	4,110
Accrued employee costs	1,109	2,196
Lease liability, current portion	2,929	2,872
Other current liabilities	234	733
Total current liabilities	13,588	14,297
Lease liability, noncurrent portion	6,702	7,455
Warrant liability	426	1,060
Total liabilities	20,716	22,812
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; 216,644 and 214,997 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	22	21
Additional paid-in capital	625,567	619,841
Accumulated other comprehensive loss	(2,979)	(524)
Accumulated deficit	(196,119)	(162,962)
Total stockholders' equity	426,491	456,376
Total liabilities, convertible preferred stock and stockholders' equity	$ 447,207	$ 479,188