Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 52,351	$ 153,001
Marketable securities	161,203	94,776
Accounts receivable	0	47
Prepaid expenses and other current assets (includes $0 and $285 at December 31, 2022 and 2021, respectively, attributable to related parties)	6,957	8,456
Total current assets	220,511	256,280
Marketable securities, long-term	4,908	67,652
Property and equipment, net	22,262	14,391
Operating lease, right-of-use assets, net	13,085	14,562
Other assets	1,080	602
Total assets	261,846	353,487
Current liabilities
Accounts payable	3,322	4,764
Accrued and other current liabilities	8,870	7,744
Deferred revenue	884	2,599
Operating lease liabilities, current portion	2,655	1,231
Total current liabilities	15,731	16,338
Deferred revenue, net of current portion	1,076	2,491
Derivative liability	212	214
Operating lease liabilities, long -term portion	13,469	15,217
Other liabilities	21	120
Total liabilities	30,509	34,380
Commitments and contingencies (Note 9)
Stockholders' equity
Preferred stock, $0.0001 par value, 10,000,000 shares authorized at December 31, 2022 and 2021; no shares issued and outstanding at December 31, 2022 and 2021	0
Common stock, $0.0001 par value, 300,000,000 shares authorized at December 31, 2022 and 2021; 32,626,627 and 32,224,524 shares issued and outstanding at December 31, 2022 and 2021, respectively	3	3
Additional paid-in-capital	547,020	526,523
Accumulated other comprehensive loss	(1,196)	(423)
Accumulated deficit	(314,490)	(206,996)
Total stockholders' equity	231,337	319,107
Total liabilities and stockholders' equity	$ 261,846	$ 353,487