Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 88,543	$ 203,126
Marketable securities	730,766	816,892
Accounts receivable, net	1,598	0
Other receivable	2,704	4,378
Inventory	4,060	0
Prepaid expenses and other current assets	42,336	39,835
Total current assets	870,007	1,064,231
Marketable securities	280,845	266,375
Operating lease assets	70,214	75,124
Property and equipment, net	27,382	28,923
Financing lease assets	64	183
Other non-current assets	3,955	2,900
Total assets	1,252,467	1,437,736
Current liabilities:
Accounts payable	7,790	16,700
Accrued expenses	28,383	31,967
Operating lease liabilities	12,056	10,828
Financing lease liabilities	167	331
Total current liabilities	48,396	59,826
Operating lease liabilities, net of current portion	78,946	85,659
Other non-current liabilities	1,055	276
Total liabilities	128,397	145,761
Stockholders’ equity:
Preferred stock, $0.001 par value; 25,000,000 shares authorized; no shares issued or outstanding at June 30, 2022 and December 31, 2021	0	0
Common stock, $0.001 par value; 125,000,000 shares authorized; 71,031,792 shares issued and 54,815,381 shares outstanding at June 30, 2022, and 70,550,631 shares issued and 54,334,220 shares outstanding at December 31, 2021	71	71
Additional paid-in capital	2,362,327	2,334,348
Accumulated other comprehensive loss	(10,502)	(1,198)
Treasury stock, at cost (16,216,411 shares at June 30, 2022 and December 31, 2021)	(802,486)	(802,486)
Accumulated deficit	(425,340)	(238,760)
Total stockholders’ equity	1,124,070	1,291,975
Total liabilities and stockholders’ equity	$ 1,252,467	$ 1,437,736