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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Current assets:    
Cash and cash equivalents $ 54,417 $ 45,204
Restricted cash 916 0
Marketable securities 0 35,798
Accounts receivable 691 923
Prepaid expenses and other current assets 12,612 12,403
Total current assets 68,636 94,328
Property and equipment, net 22,017 26,874
Operating lease right-of-use assets 20,935 25,991
Refundable research income tax credits and other non-current assets 17,373 16,627
Restricted cash 0 1,500
Total assets 128,961 165,320
Current liabilities:    
Accounts payable 15,468 15,259
Accrued compensation and employee benefits 6,300 8,918
Other accrued liabilities 18,474 23,554
Total current liabilities 40,242 47,731
Long-term portion of lease liabilities 30,817 33,515
Other non-current liabilities 1,205 1,187
Total liabilities 72,264 82,433
Commitments and contingencies
Stockholders’ equity:    
Preferred stock 0 0
Common stock 2,037 1,781
Additional paid-in capital 1,515,926 1,492,077
Accumulated deficit (1,455,465) (1,406,376)
Accumulated other comprehensive loss (5,801) (4,595)
Total stockholders’ equity 56,697 82,887
Total liabilities and stockholders’ equity $ 128,961 $ 165,320