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Stock-based Compensation and Stockholders' Equity (Tables)
 3 Months Ended
Sep. 30, 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 months ended September 30, 2016 and 2015 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions:
 
Three Months Ended
September 30,
 
2016
 
2015
Risk-free interest rate
1.12
%
 
1.57
%
Expected term
5.38 years

 
5.33 years

Dividend yield
—
%
 
—
%
Volatility
49.64
%
 
47.06
%
Weighted-average fair value
$
9.29

 
$
11.64
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 months ended September 30, 2016 and 2015 (in thousands):
 
 
Three Months Ended
September 30,
 
2016
 
2015
Cost of sales
$
309

 
$
240

Research and development
2,908

 
2,402

Sales and marketing
478

 
404

General and administrative
809

 
830

Stock-based compensation expense before taxes
4,504

 
3,876

Income tax impact
(1,286
)
 
(285
)
Stock-based compensation expense, net
$
3,218

 
$
3,591
Summary of stock option activity
The following table summarizes stock option activity during the three months ended September 30, 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, 2016 (7,495,131 shares exercisable at weighted average exercise price of $13.35 per share)
 
8,960,867

 
$
14.88

 
 
 
 
Granted (weighted average fair value of $9.29)
 
127,620

 
$
20.54

 
 
 
 
Exercised
 
(257,453
)
 
$
11.41

 
 
 
 
Forfeited
 
(12,854
)
 
$
19.78

 
 
 
 
Balance as of September 30, 2016
 
8,818,180

 
$
15.06

 
5.09
 
$
79,505

Options vested and expected to vest at September 30, 2016
 
8,744,510

 
$
14.97

 
5.06
 
$
79,405

Options vested and exercisable at September 30, 2016
 
7,494,049

 
$
13.62

 
4.55
 
$
75,717
Summary of restricted stock unit activity
The following table summarizes RSUs activity during the three months ended September 30, 2016 under all plans: 
 
RSUs
Outstanding
 
Weighted
Average
Grant-Date Fair Value per Share
 
Aggregate
Intrinsic
Value
(in thousands)
Balance as of June 30, 2016
926,983

 
$
30.23

 
 
Granted
214,370

 
$
20.54

 
 
Released
(86,445
)
 
$
28.36

 
 
Forfeited
(29,831
)
 
$
28.43

 
 
Balance as of September 30, 2016
1,025,077

 
$
28.41

 
$
23,956