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Statements of Cash Flows - Non-Cash Activities (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Supplemental disclosure of noncash activities related to the uBriGene Repurchase Transaction (see Note 5):    
Fair value of assets received $ 2,209 $ 0
Fair value of supplies received expensed to research and development 2,509 0
Accounts receivable written off (6,967) 0
Accounts payable written off 3,644 0
Net purchase consideration of assets recorded to accrued other $ (1,395) $ 0