Stock-based Compensation and Stockholders' Equity (Tables)

9 Months Ended

Mar. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of assumptions used to estimate fair value of stock options granted using Black-Scholes option pricing model

The fair value of stock option grants for the three and nine months ended March 31, 2016 and 2015 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions: 

	Three Months Ended March 31,						Nine Months Ended March 31,
	2016			2015			2016			2015
Risk-free interest rate	1.38% - 1.48%			1.35% - 1.58%			1.38% - 1.57%			1.35% - 1.76%
Expected term	5.31 years			5.40 years			5.31 - 5.33 years			5.40 - 5.44 years
Dividend yield	—		%	—		%	—		%	—		%
Volatility	49.09% - 50.89%			47.60% - 48.26%			47.06% - 50.89%			46.93% - 49.31%
Weighted-average fair value	$	12.99		$	15.92		$	12.04		$	12.59

Schedule of stock-based compensation expense

The following table shows total stock-based compensation expense included in the condensed consolidated statements of operations for the three and nine months ended March 31, 2016 and 2015 (in thousands):

	Three Months Ended March 31,						Nine Months Ended March 31,
	2016			2015			2016			2015
Cost of sales	$	294		$	222		$	792		$	651
Research and development	2,549			2,255			7,423			6,148
Sales and marketing	491			369			1,330			1,148
General and administrative	552			720			2,223			1,780
Stock-based compensation expense before taxes	3,886			3,566			11,768			9,727
Income tax impact	(1,191		)	(1,355		)	(3,290		)	(2,747		)
Stock-based compensation expense, net	$	2,695		$	2,211		$	8,478		$	6,980

Summary of stock option activity

The following table summarizes stock option activity during the nine months ended March 31, 2016 under all plans:

	Options Outstanding		Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term (in Years)	Aggregate Intrinsic Value (in thousands)
Balance as of June 30, 2015 (7,208,475 shares exercisable at weighted average exercise price of $12.24 per share)	9,702,843		$	14.21
Granted (weighted average fair value of $12.04)	279,650		$	26.61
Exercised	(897,424	)	$	11.88
Forfeited	(35,531	)	$	18.85
Balance as of March 31, 2016	9,049,538		$	14.81	5.43	$	174,856
Options vested and expected to vest at March 31, 2016	8,956,079		$	14.70	5.40	$	174,044
Options vested and exercisable at March 31, 2016	7,346,160		$	13.17	4.78	$	153,798

Summary of restricted stock unit activity

The following table summarizes restricted stock unit activity during the nine months ended March 31, 2016 under all plans: 

	Restricted Stock Units Outstanding		Weighted Average Grant-Date Fair Value per Share		Aggregate Intrinsic Value (in thousands)
Balance as of June 30, 2015	303,324		$	36.02
Granted	614,560		$	28.35
Vested	(102,918	)	$	33.24
Forfeited	(33,060	)	$	30.52
Balance as of March 31, 2016	781,906		$	30.59	$	26,647