STOCK-BASED COMPENSATION (Tables)

9 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The following table presents stock-based compensation expense:

	Three Months Ended December 31,				Nine Months Ended December 31,
	2021		2020		2021		2020
Cost of service revenue	$	2,293	$	2,472	$	6,606	$	6,696
Cost of other revenue	1,233		1,142		3,507		3,042
Research and development	8,472		8,297		26,628		23,097
Sales and marketing	11,626		9,363		38,676		22,156
General and administrative	10,113		5,565		30,742		19,949
Total	$	33,737	$	26,839	$	106,159	$	74,940

Schedule of Stock Option Activity

The following table presents stock option activity (shares in thousands):

	Number of Shares	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at March 31, 2021	1,813	$	9.46	2.86 years	$	41,673
Granted	—	—
Exercised	(685)	8.50
Cancelled/Forfeited	(31)	21.90
Outstanding at December 31, 2021	1,097	$	9.71	2.50 years	$	8,053
Vested and expected to vest at December 31, 2021	1,096	$	9.71	2.49 years	$	8,053
Exercisable at December 31, 2021	1,085	$	9.60	2.45 years	$	8,053

Schedule of Nonvested Restricted Stock Units Activity

The following table presents RSU activity (shares in thousands):

	Number of Shares	Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at March 31, 2021	8,646	$	19.27	1.85 years	$	280,467
Granted	5,278	25.23
Vested and released	(4,297)	19.27
Forfeited	(1,646)	20.77
Outstanding at December 31, 2021	7,980	$	22.90	1.03 years	$	133,750

Schedule of Share-based Compensation Arrangements by Share-based Payment Award

The following table presents the per share fair values of the first tranche based on the closing price of the Company's common stock on the grant date:

Per share fair values $24.21 - $25.78

The following table presents the estimated grant date fair values, and valuation assumptions used in the Monte Carlo pricing model, of the second and third tranches:

Second tranche per share fair values	$27.66		-	$33.32
Third tranche per share fair values	$29.59		-	$34.48
Valuation assumptions:
Expected volatility	58.7	%	-	59.7%
Risk-free interest rates	0.3	%	-	0.4%
Dividend rate	—%

The following table presents the estimated fair value on the date of grant of each of the look-back features and the assumptions used in the Black-Scholes pricing model:

Fair value of look-back options	$3.41		-	$8.24
Valuation assumptions:
Expected volatility	58.0%
Risk-free interest rates	0.05	%	-	0.07%
Expected terms (in years)	0.38		-	1.21
Dividend rate	—%

Schedule of Nonvested Performance-based Units Activity

The following table presents PSU activity (shares in thousands):

	Number of Shares	Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at March 31, 2021	1,576	$	27.33	1.24 years	$	51,116
Granted	497	30.41
Granted for performance achievement1	20	27.92
Vested and released	(250)	17.15
Cancelled/Forfeited	(632)	22.77
Outstanding at December 31, 2021	1,212	$	33.89	1.13 years	$	20,305