CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 159,410	$ 198,053
Prepaid expenses and other current assets	3,597	4,464
Total current assets	163,007	202,517
Restricted cash	1,554	1,553
Property and equipment, net	7,442	7,620
Operating lease right-of-use asset	5,789	5,977
Other non-current assets	335	393
Total assets	178,127	218,060
Current liabilities
Accounts payable	1,410	3,144
Accrued expenses	12,087	8,751
Operating lease liability, current portion	858	801
Notes payable, current portion	3,333
Other current liabilities	82	82
Total current liabilities	17,770	12,778
Notes payable, net of current portion	6,394	9,628
Operating lease liability, net of current portion	9,664	10,107
Other liabilities, long-term	82	118
Total liabilities	33,910	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 June 30, 2022 and December 31, 2021
Common stock, $0.0001 par value; 200,000,000 shares authorized at June 30, 2022 and December 31, 2021; 27,471,607 shares issued and 27,391,834 shares outstanding at June 30, 2022; 27,468,950 shares issued and 27,358,375 shares outstanding at December 31, 2021	3	3
Additional paid-in capital	351,066	346,312
Accumulated deficit	(206,852)	(160,886)
Total stockholders' equity (deficit)	144,217	185,429
Total liabilities and stockholders' equity	$ 178,127	$ 218,060