Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 197,232	$ 233,437
Prepaid expenses and other current assets	6,969	11,045
Total current assets	204,201	244,482
Operating lease right-of-use assets	166	210
Property and equipment, net	22,155	20,616
Intangible assets, net	859	1,075
Other assets		399
Total assets	227,381	266,782
Current liabilities:
Accounts payable	4,758	7,126
Accrued development expense	3,318	2,803
Accrued compensation and benefits	176	1,877
Operating lease liabilities, current	100	97
Other current liabilities	370	631
Total current liabilities	8,722	12,534
Operating lease liabilities, non-current	88	139
Other non-current liabilities	201	194
Total liabilities	9,011	12,867
Commitments and contingencies (Notes 9, 10 and 11)
Stockholders' equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized, none issued and outstanding
Common stock, $0.001 par value; 120,000,000 shares authorized; 40,097,917 and 40,016,792 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	40	40
Additional paid-in capital	462,491	461,181
Accumulated deficit	(244,161)	(207,306)
Total stockholders' equity	218,370	253,915
Total liabilities and stockholders' equity	$ 227,381	$ 266,782