Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 55,877	$ 65,799
Investments	105,013	143,987
Prepaid expenses and other current assets	7,668	5,917
Total current assets	168,558	215,703
Property and equipment, net	2,873	3,035
Restricted cash	1,168	1,223
Right-of-use assets	26,225	27,705
Other non-current assets	10	16
Total assets	198,834	247,682
Current liabilities:
Accounts payable	2,222	4,107
Accrued expenses and other current liabilities	17,484	19,535
Total current liabilities	19,706	23,642
Non-current operating lease liabilities	26,757	28,140
Total liabilities	46,463	51,782
Commitments and contingencies (Note 10)	0	0
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized at June 30, 2022 and December 31, 2021; no shares issued or outstanding at June 30, 2022 and December 31, 2021	0	0
Common stock; $0.0001 par value; 500,000,000 shares authorized at June 30, 2022 and December 31, 2021; 36,315,737 shares issued and outstanding at June 30, 2022 and 36,234,624 shares issued and outstanding at December 31, 2021	5	5
Additional paid-in capital	446,909	440,129
Accumulated other comprehensive loss	(2,286)	(414)
Accumulated deficit	(292,257)	(243,820)
Total stockholders' equity	152,371	195,900
Total liabilities and stockholders' equity	$ 198,834	$ 247,682