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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Current assets:    
Cash and cash equivalents $ 27,786 $ 45,204
Marketable securities 0 35,798
Accounts receivable 581 923
Prepaid expenses and other current assets 11,708 12,403
Total current assets 40,075 94,328
Property and equipment, net 20,619 26,874
Operating lease right-of-use assets 18,672 25,991
Refundable research income tax credits and other non-current assets 13,648 16,627
Restricted cash 0 1,500
Total assets 93,014 165,320
Current liabilities:    
Accounts payable 17,590 15,259
Accrued compensation and employee benefits 5,655 8,918
Other accrued liabilities 15,760 23,554
Total current liabilities 39,005 47,731
Long-term portion of lease liabilities 29,097 33,515
Other non-current liabilities 1,222 1,187
Total liabilities 69,324 82,433
Commitments and contingencies
Stockholders’ equity:    
Preferred stock 0 0
Common stock 2,082 1,781
Additional paid-in capital 1,519,084 1,492,077
Accumulated deficit (1,491,593) (1,406,376)
Accumulated other comprehensive loss (5,883) (4,595)
Total stockholders’ equity 23,690 82,887
Total liabilities and stockholders’ equity $ 93,014 $ 165,320