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STOCK-BASED COMPENSATION AND STOCKHOLDERS' EQUITY (Tables)
 3 Months Ended
Jun. 30, 2022
Equity [Abstract]  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
The following table presents stock-based compensation expense (dollars in thousands):
 Three Months Ended June 30,
 20222021
Cost of service revenue$2,664 $1,968 
Cost of other revenue1,111 1,071 
Research and development8,044 8,698 
Sales and marketing8,107 14,326 
General and administrative7,888 10,524 
Total$27,814 $36,587 
Disclosure of Share-Based Compensation Arrangements By Share-Based Payment Award The following table presents the stock option activity (shares in thousands):
Number of
Shares		Weighted Average Exercise Price Per Share
Outstanding at March 31, 2022867 $10.67 
Exercised(11)5.87 
Canceled/Forfeited(2)22.25 
Outstanding at June 30, 2022854 $10.71 
Vested and expected to vest June 30, 2022854 $10.71 
Exercisable at June 30, 2022852 $10.69 
The following table presents the RSU activity (shares in thousands):
Number of
Shares		Weighted
Average Grant
Date Fair Value		Weighted Average
Remaining Contractual
Term (in Years)
Balance at March 31, 20229,375 $20.41 2.11
Granted8,528 6.36 
Vested and released(1,657)21.00 
Forfeited(780)17.94 
Balance at June 30, 202215,466 $12.72 1.27
The following table presents the PSU activity (shares in thousands):
Number of
Shares		Weighted
Average Grant
Date Fair Value		Weighted Average
Remaining Contractual
Term (in Years)
Balance at March 31, 20221,026 $35.36 0.89
Granted720 7.71 
Granted for performance achievement1
— — 
Vested and released(128)25.65 
Forfeited(354)37.65 
Balance at June 30, 20221,264 $19.96 1.86
1 Represents additional PSUs awarded as a result of the achievement of performance goals above the performance targets established at grant.