Balance sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 76,732	$ 130,191
Accounts receivable, net	50	308
Prepaid expenses and other current assets	901	2,783
Total current assets	77,683	133,282
Property and equipment, net	3,030	3,312
Operating lease right-of-use-assets	12,419	30,920
Other long-term assets	1,542	1,776
Total assets	94,674	169,290
Current liabilities:
Accounts payable	1,339	3,768
Accrued compensation	3,836	4,212
Accrued liabilities	715	989
Operating lease liabilities, current portion	2,882	3,703
Total current liabilities	8,772	12,672
Operating lease liabilities, long-term portion	16,786	29,879
Total liabilities	25,558	42,551
Commitments and contingencies (Note 6)
Stockholders' equity:
Common stock, $0.0001 par value; 200,000,000 shares authorized as of December 31, 2023 and December 31 2022; 1,821,986 and 1,811,396 shares issued and outstanding at December 31, 2023 and December 31, 2022, respectively	0	0
Additional paid-in capital	609,074	604,690
Accumulated deficit	(539,961)	(477,954)
Total stockholders' equity	69,116	126,739
Total liabilities and stockholders equity	94,674	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 December 31, 2023 and December 2022; 29,863,674 shares issued and outstanding as of December 31, 2023 and December 2022; aggregate liquidation preference of $3 as of December 31, 2023 and December 2022	$ 3	$ 3