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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Current assets:    
Cash and cash equivalents $ 41,918 $ 45,204
Marketable securities 0 35,798
Accounts receivable 526 923
Refundable research income tax credits 4,072 3,144
Prepaid expenses and other current assets 5,175 9,259
Total current assets 51,691 94,328
Property and equipment, net 17,887 26,874
Operating lease right-of-use assets 16,869 25,991
Refundable research income tax credits, non-current 12,809 15,362
Other non-current assets 879 1,265
Restricted cash 1,500 1,500
Total assets 101,635 165,320
Current liabilities:    
Accounts payable 15,485 15,259
Accrued compensation and employee benefits 14,569 8,918
Other accrued liabilities 8,195 23,554
Deferred revenues 7,556 0
Total current liabilities 45,805 47,731
Deferred revenues, non-current 5,874 0
Long-term portion of lease liabilities 26,253 33,515
Other non-current liabilities 933 1,187
Total liabilities 78,865 82,433
Commitments and contingencies
Stockholders’ equity:    
Preferred stock, $0.01 par value, 5,000,000 shares authorized, and no shares issued or outstanding 0 0
Common stock, $0.01 par value; 960,000,000 shares authorized; 212,837,679 and 178,133,548 shares issued and outstanding at December 31, 2024 and 2023, respectively 2,128 1,781
Additional paid-in capital 1,532,489 1,492,077
Accumulated deficit (1,504,317) (1,406,376)
Accumulated other comprehensive loss (7,530) (4,595)
Total stockholders’ equity 22,770 82,887
Total liabilities and stockholders’ equity $ 101,635 $ 165,320