CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 139,143	$ 198,053
Prepaid expenses and other current assets	3,171	4,464
Total current assets	142,314	202,517
Restricted cash	1,557	1,553
Property and equipment, net	7,553	7,620
Operating lease right-of-use asset	5,689	5,977
Other non-current assets	301	393
Total assets	157,414	218,060
Current liabilities
Accounts payable	1,810	3,144
Accrued expenses	9,062	8,751
Operating lease liability, current portion	888	801
Notes payable, current portion	5,000
Other current liabilities	82	82
Total current liabilities	16,842	12,778
Notes payable, net of current portion	4,781	9,628
Operating lease liability, net of current portion	9,429	10,107
Other liabilities, long-term	64	118
Total liabilities	31,116	32,631
Commitments and contingencies (Note 7)
Stockholders' equity
Preferred stock, $0.0001 par value; 5,000,000 shares authorized, no shares issued or outstanding at September 30, 2022 and December 31, 2021
Common stock, $0.0001 par value; 200,000,000 shares authorized at September 30, 2022 and December 31, 2021; 27,471,607 shares issued and 27,407,149 shares outstanding at September 30, 2022; 27,468,950 shares issued and 27,358,375 shares outstanding at December 31, 2021	3	3
Additional paid-in capital	352,937	346,312
Accumulated deficit	(226,642)	(160,886)
Total stockholders' equity (deficit)	126,298	185,429
Total liabilities and stockholders' equity	$ 157,414	$ 218,060