Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 290,147	$ 427,879
Marketable securities	528,139	553,703
Prepaid and other current assets	13,381	10,880
Total current assets	831,667	992,462
Property and equipment, net	5,046	3,822
Right-of-use lease assets	4,583	5,158
Other assets	2,039	2,021
Total assets	843,335	1,003,463
Current liabilities:
Accounts payable	7,934	5,656
Accrued expenses and other current liabilities	25,568	25,300
Accrued compensation	11,874	12,503
Current portion of operating lease liabilities	4,047	3,630
Total current liabilities	49,423	47,089
Operating lease liabilities, long-term	890	1,949
Commitments and contingencies (Note 8)
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized at June 30, 2022 and December 31, 2021, zero shares outstanding at June 30, 2022 and December 31, 2021	0	0
Common stock, $0.0001 par value; 200,000,000 shares authorized at June 30, 2022 and December 31, 2021; 49,885,036 and 49,582,638 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	5	5
Additional paid-in capital	1,514,191	1,472,421
Accumulated other comprehensive (loss)/income	(6,914)	(1,274)
Accumulated deficit	(714,260)	(516,727)
Total stockholders' equity	793,022	954,425
Total liabilities and stockholders’ equity	$ 843,335	$ 1,003,463