CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 93,271	$ 120,385
Prepaid expenses and other current assets	3,705	4,111
Total current assets	96,976	124,496
Restricted cash	1,568	1,562
Property and equipment, net	7,252	7,255
Operating lease right-of-use asset	5,477	5,585
Other non-current assets	232	267
Total assets	111,505	139,165
Current liabilities
Accounts payable	2,013	3,125
Accrued expenses	6,483	10,327
Operating lease liability, current portion	949	918
Note payable, current portion	6,667	6,667
Other current liabilities	82	82
Total current liabilities	16,194	21,119
Note payable, net of current portion	1,548	3,165
Operating lease liability, net of current portion	8,945	9,189
Other non-current liabilities	26	45
Total liabilities	26,713	33,518
Commitments and contingencies (Note 6)
Stockholders' equity
Preferred stock, $0.0001 par value; 5,000,000 shares authorized, no shares issued or outstanding
Common stock, $0.0001 par value; 200,000,000 shares authorized at March 31, 2023 and December 31, 2022; 27,470,534 shares issued and 27,439,820 shares outstanding at March 31, 2023; 27,471,607 shares issued and 27,425,447 shares outstanding at December 31, 2022	3	3
Additional paid-in capital	356,543	354,752
Accumulated deficit	(271,754)	(249,108)
Total stockholders' equity	84,792	105,647
Total liabilities and stockholders' equity	$ 111,505	$ 139,165