Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 44,396	$ 49,978
Short-term investments	284,219	214,514
Accounts receivable, net	4,759	411
Accounts receivable from related party	187	43
Inventory	5,474	851
Prepaid expenses and other current assets	6,137	3,380
Total current assets	345,172	269,177
Property and equipment, net	30,856	32,269
Long-term investments	17,551	97,856
Operating lease right-of-use assets	24,359	24,806
Other assets	1,452	1,544
Total assets	419,390	425,652
Current liabilities:
Accounts payable	7,592	6,746
Accrued and other current liabilities	27,744	26,358
Long-term debt, current	19,720	18,920
Deferred revenue from related party	21,022	10,993
Total current liabilities	76,078	63,017
Long-term debt, net	4,005	4,715
Non-current deferred revenue from related party	57,299	24,772
Non-current lease liabilities	45,243	46,830
Other non-current liabilities	235	198
Total liabilities	182,860	139,532
Commitments (Note 7)
Stockholders’ equity:
Preferred stock, $0.001 par value, 10,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.001 par value, 200,000,000 shares authorized; 71,344,838 and 70,357,557 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	71	70
Additional paid-in capital	926,141	903,646
Note receivable	(16)	(16)
Accumulated other comprehensive loss	(2,310)	(483)
Accumulated deficit	(687,356)	(617,097)
Total stockholders’ equity	236,530	286,120
Total liabilities and stockholders’ equity	$ 419,390	$ 425,652