CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 23,645	$ 27,661
Short-term investments, available-for-sale	112,585	155,174
Accounts receivable	155	4
Prepaid expenses and other current assets	4,517	6,271
Total current assets	140,902	189,110
Long-term investments	16,201	21,657
Property and equipment, net of accumulated depreciation	281	224
Operating lease right-of-use assets	1,089	1,482
Other long-term assets	195	301
Total assets	158,668	212,774
Current liabilities:
Accounts payable	5,340	2,851
Accrued liabilities	16,904	15,592
Total current liabilities	22,244	18,443
Line of credit commitment fee	0	125
Lease-related obligations	644	1,177
Total liabilities	22,888	19,745
Stockholders’ equity:
Preferred stock, $0.001 par value, 10,000,000 shares authorized at September 30, 2024 and December 31, 2023; no shares issued and outstanding as of September 30, 2024 and December 31, 2023	0	0
Common stock, $0.001 par value, 200,000,000 shares authorized at September 30, 2024 and December 31, 2023; 89,936,053 and 88,929,300 shares issued and outstanding as of September 30, 2024 and December 31, 2023, respectively	90	89
Additional paid-in capital	996,389	988,457
Accumulated other comprehensive gain, net	258	7
Accumulated deficit	(860,957)	(795,524)
Total stockholders’ equity	135,780	193,029
Total liabilities and stockholders’ equity	$ 158,668	$ 212,774