CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 59,772	$ 120,385
Prepaid expenses and other current assets	4,708	4,111
Total current assets	64,480	124,496
Restricted cash	1,580	1,562
Property and equipment, net	6,366	7,255
Operating lease right-of-use asset	5,247	5,585
Other non-current assets	169	267
Total assets	77,842	139,165
Current liabilities
Accounts payable	1,486	3,125
Accrued expenses	9,404	10,327
Operating lease liability, current portion	1,014	918
Note payable, current portion	4,957	6,667
Other current liabilities	68	82
Total current liabilities	16,929	21,119
Note payable, net of current portion		3,165
Operating lease liability, net of current portion	8,415	9,189
Other non-current liabilities		45
Total liabilities	25,344	33,518
Commitments and contingencies (Note 7)
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 September 30, 2023 and December 31, 2022; 27,542,000 shares issued and 27,528,926 shares outstanding at September 30, 2023; 27,471,607 shares issued and 27,425,447 shares outstanding at December 31, 2022	3	3
Additional paid-in capital	360,352	354,752
Accumulated deficit	(307,857)	(249,108)
Total stockholders' equity	52,498	105,647
Total liabilities and stockholders' equity	$ 77,842	$ 139,165