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Liability Related to Sale of Future Royalties (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 31, 2019
Mar. 31, 2023
Mar. 31, 2022
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2015
Liability Related to Sale of Future Royalties            
Non-cash royalty revenue related to the sale of future royalties   $ 2,157 $ 2,364      
Kadcyla            
Liability Related to Sale of Future Royalties            
Percentage of royalty payments if applicable threshold is met           85.00%
IRH | Kadcyla            
Liability Related to Sale of Future Royalties            
Percentage of royalty payments           100.00%
Percentage of royalty payments if applicable threshold is met           15.00%
Transaction costs for royalty agreements           $ 5,900
Change in liability related to sale of future royalties            
Liability related to sale of future royalties, net - beginning balance   32,108        
Proceeds from sale of future royalties, net   200,000       200,000
KADCYLA royalty payments received and paid   (3,553)        
Non-cash interest expense recognized   853        
Liability related to sale of future royalties, net - ending balance   $ 29,408        
Effective annual interest rate   10.50%        
Current effective interest rate   10.0        
IRH | Kadcyla | Maximum            
Liability Related to Sale of Future Royalties            
Royalties threshold           260,000
IRH | Kadcyla | Minimum            
Liability Related to Sale of Future Royalties            
Royalties threshold           $ 235,000
OMERS | Kadcyla            
Liability Related to Sale of Future Royalties            
Percentage of royalty payments 100.00%          
Non-cash royalty revenue related to the sale of future royalties $ 65,200   $ 4,100      
Contingent broker fees 1,500          
Net proceeds from sale of residual rights to receive royalty payments $ 65,200 $ 2,700        
Roche            
Liability Related to Sale of Future Royalties            
Period in arrears to receive royalty reports and payments related to sales of kadcyla   3 months        
Roche | Kadcyla            
Liability Related to Sale of Future Royalties            
Non-cash royalty revenue related to the sale of future royalties       $ 4,800 $ 6,400