Stock-Based Compensation And Employee Purchase Plan (Tables)

12 Months Ended

Mar. 31, 2018

Employee Stock Purchase Plan

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The estimated fair value of stock purchase rights granted under the Employee Stock Purchase Plan was estimated using the Black-Scholes pricing model with the following weighted-average assumptions:

		Years Ended March 31,
		2018		2017		2016
Expected volatility		40%		37%		43%
Expected dividend yield		-		-		-
Risk-free interest rate		1.33%		0.65%		0.39%
Weighted average expected term (in years)		0.8 years		0.8 years		0.8 years
Weighted average fair value of rights granted	$	4.10	$	4.19	$	3.25

Option Grants

Disclosure Of Share-Based Compensation Arrangements By Share-Based Payment Award

Stock Option activity under all the Company's stock option plans since March 31, 2015, is summarized as follows:

			Weighted
			Average
			Exercise
	Number of		Price
	Shares		Per Share
Outstanding at March 31, 2015	5,327,907	$	5.19
Granted	723,776		8.63
Exercised	(1,162,175)		2.56
Canceled/Forfeited	(96,242)		8.06
Outstanding at March 31, 2016	4,793,266		6.29
Granted	407,392		14.63
Exercised	(603,998)		2.34
Canceled/Forfeited	(134,248)		8.41
Outstanding at March 31, 2017	4,462,412		7.52
Granted	609,135		14.95
Exercised	(773,897)		3.95
Canceled/Forfeited	(299,365)		13.05
Outstanding at March 31, 2018	3,998,285	$	8.93
Vested and expected to vest at March 31, 2018	3,998,285	$	8.93
Exercisable at March 31, 2018	3,025,925	$	7.66

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The fair value of each of the Company's option grants has been estimated on the date of grant using the Black-Scholes pricing model with the following assumptions:

		Years Ended March 31,
		2018		2017		2016
Expected volatility		41%		44%		53%
Expected dividend yield		-		-		-
Risk-free interest rate		1.8% to 2.4%		1.1% to 2.2%		1.5% to 1.8%
Weighted average expected term (in years)		4.8 years		4.9 years		5.4 years
Weighted average fair value of options granted	$	5.70	$	5.74	$	4.17

Stock Purchase Rights

Disclosure Of Share-Based Compensation Arrangements By Share-Based Payment Award

Stock Purchase Right activity since March 31, 2015 is summarized as follows:

			Weighted	Weighted
			Average	Average
			Grant-Date	Remaining
	Number of		Fair Market	Contractual
	Shares		Value	Term (in Years)
Balance at March 31, 2015	223,835	$	5.92	1.50
Granted	-		-
Vested and released	(115,789)		5.32
Forfeited	(25,875)		7.40
Balance at March 31, 2016	82,171		6.30	0.76
Granted	-		-
Vested and released	(69,426)		6.00
Forfeited	(1,375)		6.72
Balance at March 31, 2017	11,370		8.10	1.09
Granted	-		-
Vested and released	(6,395)		8.26
Forfeited	-		-
Balance at March 31, 2018	4,975	$	7.88	0.10

Restricted Stock Units

Disclosure Of Share-Based Compensation Arrangements By Share-Based Payment Award

Restricted Stock Unit activity since March 31, 2015 is summarized as follows:

			Weighted	Weighted Average
	Number of		Average Grant	Remaining Contractual
	Shares		Date Fair Value	Term (in Years)
Balance at March 31, 2015	2,698,686	$	7.33	1.88
Granted	2,681,997		8.78
Vested and released	(589,788)		7.79
Forfeited	(246,096)		8.15
Balance at March 31, 2016	4,544,799		8.08	1.67
Granted	2,491,877		15.15
Vested and released	(1,600,831)		7.89
Forfeited	(496,795)		9.56
Balance at March 31, 2017	4,939,050		11.57	1.55
Granted	3,481,870		14.41
Vested and released	(1,833,038)		10.27
Forfeited	(652,339)		12.73
Balance at March 31, 2018	5,935,543	$	13.51	1.60