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Long-Term Debt (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Mar. 10, 2021
Mar. 29, 2024
Mar. 29, 2023
Mar. 29, 2022
Sep. 30, 2021
Sep. 30, 2021
Sep. 30, 2020
Mar. 29, 2021
Debt Instrument [Line Items]                
Converted principal amount           $ 4,316  
Secured Term Loan Facility [Member]                
Debt Instrument [Line Items]                
Aggregate principal amount $ 80,000              
Drew amount               $ 25,000
Net proceeds 24,400              
Net Lenzilumab Product Revenue $ 100,000              
Base interest rate 8.75%       9.00% 9.00%    
Floating interest rate, deduction 3.25%              
Base interest rate reduction, basis points 0.25%              
Unrestricted cash $ 10,000              
Unrestricted net cash proceeds $ 100,000              
Conversion price $ 19.57              
Interest expense         $ 700 $ 1,500    
End of term fee percentage 6.75%              
Secured Term Loan Facility [Member] | Subsequent Event [Member]                
Debt Instrument [Line Items]                
Percentage of amount borrowed if repayment occurs   1.00% 1.50% 2.00%        
Secured Term Loan Facility [Member] | Minimum [Member]                
Debt Instrument [Line Items]                
Net Lenzilumab Product Revenue $ 250,000              
Converted principal amount 5,000              
Secured Term Loan Facility [Member] | Maximum [Member]                
Debt Instrument [Line Items]                
Net Lenzilumab Product Revenue 350,000              
Converted principal amount 10,000              
Secured Term Loan Facility [Member] | Second tranche [Member] | Minimum [Member]                
Debt Instrument [Line Items]                
Drew amount 25,000              
Secured Term Loan Facility [Member] | Second tranche [Member] | Maximum [Member]                
Debt Instrument [Line Items]                
Drew amount 35,000              
Secured Term Loan Facility [Member] | Third tranche [Member]                
Debt Instrument [Line Items]                
Drew amount $ 20,000