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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Current assets:    
Cash and cash equivalents $ 189,761 $ 70,023
Restricted cash 1,119 1,115
Marketable securities 253,288 263,676
Interest and other receivables 1,629 1,655
Prepaid and other current assets 5,712 4,879
Total current assets 451,509 341,348
Noncurrent marketable securities 20,782 43,298
Property and equipment, net 1,681 1,177
Operating leases, right-of-use assets 3,392 3,556
Deposits and other assets 4,710 4,697
Total assets 482,074 394,076
Current liabilities:    
Accounts payable 9,992 6,161
Accrued compensation and benefits 6,794 13,759
Operating lease liabilities 955 949
Debt 71,526 46,893
Accrued liabilities 33,891 40,308
Total current liabilities 123,158 108,070
Noncurrent operating lease liabilities 2,829 3,006
Noncurrent debt 11,219 35,051
Commitments and contingencies
Stockholders' equity:    
Common stock 591 545
Additional paid-in capital 1,997,709 1,844,988
Accumulated deficit (1,653,159) (1,597,769)
Accumulated other comprehensive loss (273) 185
Total stockholders' equity 344,868 247,949
Total liabilities and stockholders' equity $ 482,074 $ 394,076