Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 28,415	$ 26,301
Marketable securities	9,932	26,774
Prepaid expenses and other current assets	3,742	2,865
Total current assets	42,089	55,940
Long-term equity investments	20,908	20,974
Restricted cash	1,931	1,931
Right-of-use asset, net	12,215	12,797
Property and equipment, net	285	433
Other noncurrent assets	0	92
Total assets	77,428	92,167
Current liabilities:
Accounts payable	3,950	3,192
Accrued expenses	2,872	5,994
Current portion, lease liability	1,384	1,336
Deferred revenue	718	0
Total current liabilities	8,924	10,522
Long-term liabilities:
Lease liability	12,715	13,419
Total liabilities	21,639	23,941
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized; Series A convertible preferred stock, 10,000 shares designated, 1,250 shares issued and outstanding at June 30, 2025 and December 31, 2024	0	0
Common stock, $0.001 par value; 125,000,000 shares authorized; 71,109,514 and 71,009,866 shares issued and outstanding at June 30, 2025 and December 31, 2024, respectively	71	71
Additional paid-in-capital	375,005	372,489
Accumulated other comprehensive loss	(69)	(35)
Accumulated deficit	(319,218)	(304,299)
Total stockholders’ equity	55,789	68,226
Total liabilities and stockholders’ equity	$ 77,428	$ 92,167