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Stock-based Compensation and Stockholders' Equity (Tables)
 12 Months Ended
Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The fair value of stock option grants for the years ended June 30, 2015, 2014 and 2013 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions:
 
 
Years Ended June 30,
 
2015
 
2014
 
2013
Risk-free interest rate
1.35% - 1.76%

 
1.53% - 1.90%

 
0.65% - 0.90%

Expected life
5.40 - 5.44 years

 
5.49 - 5.58 years

 
5.03 - 5.15 years

Dividend yield
—
%
 
—
%
 
—
%
Volatility
46.93% - 49.31%

 
43.48% - 50.07%

 
51.27% - 51.76%

Weighted-average fair value
$
12.72

 
$
7.23

 
$
4.53
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
The following table shows total stock-based compensation expense included in the consolidated statements of operations for the years ended June 30, 2015, 2014 and 2013 (in thousands):
 
 
Years Ended June 30,
 
2015
 
2014
 
2013
Cost of sales
$
901

 
$
941

 
$
953

Research and development
8,643

 
6,783

 
6,527

Sales and marketing
1,553

 
1,260

 
1,541

General and administrative
2,602

 
2,078

 
2,340

Stock-based compensation expense before taxes
13,699

 
11,062

 
11,361

Income tax impact
(3,791
)
 
(2,426
)
 
(548
)
Stock-based compensation expense, net
$
9,908

 
$
8,636

 
$
10,813
Schedule of Share-based Compensation, Stock Options, Activity
The following table summarizes stock option activity during the years ended June 30, 2015, 2014 and 2013 under all stock option 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, 2012 (7,410,152 shares exercisable at weighted average exercise price of $8.25 per share)
 
11,302,228

 
$
10.36

 
 
 
 
Granted (weighted average fair value of $4.53)
 
1,952,270

 
11.83

 
 
 
 
Exercised
 
(612,034
)
 
3.01

 
 
 
 
Forfeited
 
(436,286
)
 
14.01

 
 
 
 
Balance as of June 30, 2013 (8,731,818 shares exercisable at weighted average exercise price of $9.66 per share)
 
12,206,178

 
10.83

 
 
 
 
Granted (weighted average fair value of $7.23)
 
1,808,006

 
15.87

 
 
 
 
Exercised
 
(2,863,878
)
 
8.36

 
 
 
 
Forfeited
 
(244,704
)
 
14.25

 
 
 
 
Balance as of June 30, 2014 (7,558,631 shares exercisable at weighted average exercise price of $11.05 per share)
 
10,905,602

 
12.24

 
 
 
 
Granted (weighted average fair value of $12.72)
 
1,093,920

 
28.28

 
 
 
 
Exercised
 
(2,124,401
)
 
10.99

 
 
 
 
Forfeited
 
(172,278
)
 
18.68

 
 
 
 
Balance as of June 30, 2015
 
9,702,843

 
$
14.21

 
5.93
 
$
150,746

Options vested and expected to vest at June 30, 2015
 
9,531,602

 
$
14.04

 
5.87
 
$
149,539

Options vested and exercisable at June 30, 2015
 
7,208,475

 
$
12.24

 
5.04
 
$
124,991
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
Additional information regarding options outstanding as of June 30, 2015, is as follows:
 
 
 
Options Outstanding
 
Options Vested and Exercisable
Range of
Exercise Prices
 
Number
Outstanding
 
Weighted-
Average
Remaining
Contractual
Term (Years)
 
Weighted-
Average
Exercise
Price Per
Share
 
Number
Exercisable
 
Weighted-
Average
Exercise
Price Per
Share
$3.25 - 7.46
 
1,014,562

 
3.14
 
$
5.79

 
1,014,562

 
$
5.79

7.91 - 9.24
 
1,193,314

 
4.10
 
8.51

 
1,083,090

 
8.44

9.72 - 10.66
 
1,363,849

 
4.81
 
10.38

 
1,157,004

 
10.44

10.68 - 12.50
 
1,027,794

 
6.35
 
11.79

 
802,857

 
11.72

12.68 - 13.89
 
1,006,396

 
4.39
 
13.51

 
1,003,144

 
13.51

14.23 - 15.22
 
975,057

 
7.40
 
14.68

 
628,936

 
14.89

15.54 - 17.96
 
986,861

 
7.34
 
17.46

 
643,547

 
17.32

18.59 - 20.70
 
1,113,157

 
7.14
 
19.19

 
737,161

 
19.12

21.86 - 37.06
 
986,353

 
9.30
 
28.10

 
138,174

 
25.88

39.19
 
35,500

 
9.62
 
39.19

 
—

 
—

$3.25 - $39.19
 
9,702,843

 
5.93
 
$
14.21

 
7,208,475

 
$
12.24
Schedule of Share-based Compensation, Restricted Stock Units Activity
The following table summarizes restricted stock unit activity during the year ended June 30, 2015 under the 2006 Plan: 
 
 
Restricted Stock Units
Outstanding
 
Weighted
Average
Grant-Date Fair Value per Share
 
Aggregate
Intrinsic
Value
(in thousands)
Balance as of June 30, 2014
 
—

 
$
—

 
 
Granted
 
374,720

 
$
35.82

 
 
Vested
 
(14,685
)
 
$
35.23

 
 
Forfeited
 
(56,711
)
 
$
34.90

 
 
Balance as of June 30, 2015
 
303,324

 
$
36.02

 
$
8,972
Nonvested Restricted Stock Shares Activity
The following table summarizes the Company’s restricted stock award activity for the years ended June 30, 2015, 2014 and 2013:
 
 
Restricted Stock Awards
 
Number
of Shares
 
Weighted
Average
Grant Date
Fair Value
Per Share
Nonvested stock at June 30, 2012
362,782

 
$
10.72

Granted
—

 
—

Vested
(183,141
)
 
10.79

Forfeited
—

 
—

Nonvested stock at June 30, 2013
179,641

 
10.66

Granted
3,500

 
14.23

Vested
(183,141
)
 
10.73

Forfeited
—

 
—

Nonvested stock at June 30, 2014
—

 
—

Granted
—

 
—

Vested
—

 
—

Forfeited
—

 
—

Nonvested stock at June 30, 2015
—

 
$
—