CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 116,945	$ 70,023
Restricted cash	1,123	1,115
Marketable securities	245,789	263,676
Accounts receivable, net	874
Interest and other receivables	2,252	1,655
Inventory	774
Prepaid and other current assets	5,551	4,879
Total current assets	373,308	341,348
Noncurrent marketable securities	66,505	43,298
Property and equipment, net	1,626	1,177
Operating leases, right-of-use assets	3,225	3,556
Deposits and other assets	4,735	4,697
Total assets	449,399	394,076
Current liabilities:
Accounts payable	5,620	6,161
Accrued compensation and benefits	11,382	13,759
Operating lease liabilities	961	949
Debt	46,917	46,893
Accrued liabilities	38,660	40,308
Total current liabilities	103,540	108,070
Noncurrent operating lease liabilities	2,645	3,006
Noncurrent debt	36,519	35,051
Commitments and contingencies
Stockholders' equity:
Common stock	601	545
Additional paid-in capital	2,027,173	1,844,988
Accumulated deficit	(1,720,542)	(1,597,769)
Accumulated other comprehensive loss	(537)	185
Total stockholders' equity	306,695	247,949
Total liabilities and stockholders' equity	$ 449,399	$ 394,076