Condensed Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 87,996	$ 130,191
Accounts receivable, net	5	308
Prepaid expenses and other current assets	1,531	2,783
Total current assets	89,532	133,282
Property and equipment, net	3,332	3,312
Operating lease right-of-use-assets	12,822	30,920
Other long-term assets	1,542	1,776
Total assets	107,228	169,290
Current liabilities:
Accounts payable	2,697	3,768
Accrued compensation	2,255	4,212
Accrued liabilities	637	989
Operating lease liabilities, current portion	2,861	3,703
Total current liabilities	8,450	12,672
Operating lease liabilities, long-term portion	17,222	29,879
Total liabilities	25,672	42,551
Commitments and contingencies (Note 5)
Stockholders equity:
Common Stock, $0.0001 par value; 200,000,000 shares authorized as of September 30, 2023 and December 31, 2022; 1,819,136 and 1,811,396 shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	0	0
Additional paid-in capital	608,054	604,690
Accumulated deficit	(526,501)	(477,954)
Total stockholders' equity	81,556	126,739
Total liabilities and stockholders equity	107,228	169,290
Series 1 Convertible Preferred Stock
Stockholders equity:
Series 1 convertible preferred stock, $0.0001 par value -60,000,000 shares authorized as of September 30, 2023 and December 31, 2022; 29,863,674 shares issued and outstanding as of September 30, 2023 and December 31, 2022; aggregate liquidation preference of $3 as of September 30, 2023 and December 31, 2022	$ 3	$ 3