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Stock-based compensation (Tables)
 3 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of stock-based compensation expense
Stock-based compensation expense was classified in the consolidated statements of operations as follows:
Three Months Ended
June 30,
20242023
Research and development$4,226 $3,298 
Selling, general and administrative5,249 5,548 
$9,475 $8,846 

     The following table summarizes stock-based compensation expense by award type for the three months ended June 30, 2024 and 2023:
Three Months Ended
June 30,
20242023
Stock options$5,733 $5,614 
Restricted and performance stock units
3,742 3,232 
$9,475 $8,846 
Schedule of assumptions used to determine the grant-date fair value of stock options granted
The following table presents, on a weighted-average basis, the assumptions that the Company used to determine the grant-date fair value of stock options granted to employees and directors:
Three Months Ended
June 30,
20242023
Risk-free interest rate4.43 %3.60 %
Expected term (in years)6.06.0
Expected volatility76.3 %74.1 %
Expected dividend yield0 %0 %
Schedule of of stock option activity
The following table summarizes the Company’s stock option activity:
Number of
Shares		Weighted
Average
Exercise
Price		Weighted
Average
Contractual
Term (Years)		Aggregate
Intrinsic
Value
Outstanding as of March 31, 20248,652,256 $16.94 6.61$5,748 
Granted1,744,401 $7.73 
Exercised(22,860)$2.91 
Cancelled(216,743)$17.82 
Outstanding as of June 30, 202410,157,054 $15.37 6.84$8,837 
Options exercisable as of June 30, 20246,152,459 $16.16 5.40$6,541 
Options vested and expected to vest as of June 30, 202410,157,054 $15.37 6.84$8,837 
Schedule of share-based payment arrangement, restricted stock and restricted stock unit, activity
A summary of the changes in the Company's RSUs and PSUs during the three months ended June 30, 2024 is as follows:
Number of Restricted SharesWeighted
Average
Grant Date Fair Value
Outstanding as of March 31, 20242,397,890 17.97 
Granted1,560,527 7.72 
Vested(463,841)22.03 
Cancelled(124,393)15.23 
Outstanding as of June 30, 20243,370,183 $12.77