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Share based compensation (Tables)
 9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Allocation of Share Based Compensation Expense
The following table shows the allocation of share-based compensation between research and development and selling, general and administrative costs (in thousands):
Three months ended September 30,Nine months ended September 30,
2024202320242023
Research and development$790 $1,110 $5,470 $3,336 
Selling, general and administrative 6,864 3,969 22,036 11,107 
Total$7,654 $5,079 $27,506 $14,443 
Share Option Activity
Number of share options outstanding
Balance as of December 31, 202324,689,624 
Granted2,432,000 
Forfeited(64,000)
Exercised(1,037,424)
Balance as of March 31, 202426,020,200 
Granted7,924,000 
Forfeited(72,000)
Expired(160,000)
Balance as of June 30, 202433,712,200 
Granted2,056,000 
Forfeited(107,632)
Exercised(2,654,960)
Balance as of September 30, 202433,005,608 
Restricted Stock Unit Activity
Number of RSUs outstanding
Balance as of December 31, 202319,502,624 
Forfeited(1,752)
Vested (4,357,208)
Balance as of March 31, 202415,143,664 
Vested(2,045,384)
Balance as of June 30, 202413,098,280 
Forfeited(566,824)
Vested(2,045,376)
Balance as of September 30, 202410,486,080 
A summary of the Company’s PRSU activity for the period ended September 30, 2024 is as follows:
Number of PRSUs outstanding
Balance as of December 31, 202310,730,144 
Forfeited(5,248)
Balance as of March 31, 202410,724,896 
Balance as of June 30, 202410,724,896 
Forfeited(420,864)
Vested(3,569,696)
Balance as of September 30, 20246,734,336