Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 158,265	$ 375,145
Marketable securities	153,939	0
Tenant receivable	1,778	0
Prepaid expenses and other current assets	7,149	4,041
Total current assets	321,131	379,186
Property and equipment, net	24,885	25,886
Operating lease right-of-use assets	62,958	65,143
Restricted cash	5,692	5,692
Deferred offering costs	456	461
Other long-term assets	3,872	403
Total assets	418,994	476,771
Current liabilities:
Accounts payable	1,087	2,023
Accrued expenses and other current liabilities	8,979	12,177
Operating lease liability	6,119	4,608
Total current liabilities	16,185	18,808
Operating lease liability, net of current portion	77,935	76,217
Total liabilities	94,120	95,025
Commitments and contingencies (Note 8)
Stockholders' equity:
Preferred stock, $0.0001 par value; 5,000,000 shares authorized and no shares issued or outstanding at June 30, 2022 and December 31, 2021	0	0
Common stock, $0.0001 par value; 150,000,000 shares authorized at June 30, 2022 and December 31, 2021; 57,597,141 and 56,980,701 shares issued at June 30, 2022 and December 31, 2021, respectively; 57,597,141 and 56,969,618 shares outstanding at June 30, 2022 and December 31, 2021, respectively	6	6
Additional paid-in capital	706,261	689,866
Accumulated other comprehensive income	(339)	0
Accumulated deficit	(381,054)	(308,126)
Total stockholders' equity	324,874	381,746
Total liabilities and stockholders' equity	$ 418,994	$ 476,771