Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Accounts receivable (Details)

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Summary of Significant Accounting Policies - Accounts receivable (Details)
Mar. 31, 2024
USD ($)
customer
Dec. 31, 2023
USD ($)
Mar. 31, 2023
customer
Accounts receivable      
Number of customers | customer     2
Accounts receivable $ 8,404,000 $ 821,000  
Allowance for doubtful accounts 0    
Customer Concentration Risk      
Accounts receivable      
Accounts receivable 8,404,000 $ 821,000  
Customer Concentration Risk | Genentech, Inc.      
Accounts receivable      
Accounts receivable $ 0    
Customer Concentration Risk | Genentech and GSK Customers      
Accounts receivable      
Number of customers | customer 2