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Stock-based Compensation and Stockholders' Equity (Tables)
 12 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement [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 fiscal years ended June 30, 2020, 2019 and 2018 was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions:
 
 
Years Ended June 30,
 
2020
 
2019
 
2018
Risk-free interest rate
0.47% - 1.72%

 
2.32% - 2.97%

 
1.92% - 2.86%

Expected term
6.27 years

 
6.05 years

 
5.82 years

Dividend yield
—
%
 
—
%
 
—
%
Volatility
49.61% - 50.46%

 
47.34% - 50.28%

 
45.32% - 48.07%

Weighted-average fair value
$
9.59

 
$
9.25

 
$
10.98
Schedule of stock-based compensation expense
The following table shows total stock-based compensation expense included in the consolidated statements of operations for the fiscal years ended June 30, 2020, 2019 and 2018 (in thousands):
 
 
Years Ended June 30,
 
2020
 
2019
 
2018
Cost of sales
$
1,504

 
$
1,663

 
$
1,812

Research and development
12,202

 
12,981

 
13,893

Sales and marketing
1,680

 
1,805

 
1,980

General and administrative
4,803

 
4,735

 
6,971

Stock-based compensation expense before taxes
20,189

 
21,184

 
24,656

Income tax impact
(6,814
)
 
(4,349
)
 
(6,902
)
Stock-based compensation expense, net
$
13,375

 
$
16,835

 
$
17,754
Summary of stock option activity
The following table summarizes stock option activity during the fiscal years ended June 30, 2020, 2019 and 2018 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, 2017
 
8,375,659

 
$
15.88

 
 
 
 
Granted
 
489,705

 
$
23.58

 
 
 
 
Exercised
 
(267,970
)
 
$
11.36

 
 
 
 
Forfeited/Cancelled
 
(296,256
)
 
$
15.36

 
 
 
 
Balance as of June 30, 2018
 
8,301,138

 
$
16.50

 
 
 
 
Granted
 
434,320

 
$
18.58

 
 
 
 
Forfeited/Cancelled
 
(1,360,823
)
 
$
8.94

 
 
 
 
Balance as of June 30, 2019
 
7,374,635

 
$
18.02

 
 
 
 
Granted
 
273,260

 
$
19.61

 
 
 
 
Exercised
 
(1,812,000
)
 
$
15.74

 
 
 
 
Forfeited/Cancelled
 
(456,127
)
 
$
11.97

 
 
 
 
Balance as of June 30, 2020
 
5,379,768

 
$
19.38

 
4.07
 
$
50,245

Options vested and exercisable at June 30, 2020
 
4,723,734

 
$
19.25

 
3.46
 
$
44,932
Schedule of significant ranges of outstanding and exercisable stock options Additional information regarding options outstanding as of June 30, 2020, 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
$9.24 - $11.76
 
613,268

 
2.35
 
$
10.26

 
613,268

 
$
10.26

12.37 - 13.67
 
554,260

 
2.62
 
$
13.01

 
489,132

 
$
13.01

14.23 - 15.22
 
583,989

 
2.84
 
$
14.65

 
559,995

 
$
14.64

15.54 - 17.60
 
588,616

 
3.69
 
$
17.29

 
454,312

 
$
17.20

17.69 - 18.93
 
776,839

 
2.65
 
$
18.51

 
776,839

 
$
18.51

20.37 - 22.05
 
546,617

 
5.61
 
$
20.93

 
385,163

 
$
20.98

22.10 - 25.44
 
786,440

 
6.40
 
$
23.98

 
562,458

 
$
24.51

26.60 - 28.45
 
652,579

 
5.66
 
$
27.15

 
606,617

 
$
27.09

28.71 - 37.06
 
249,160

 
4.76
 
$
34.28

 
247,950

 
$
34.31

39.19
 
28,000

 
4.62
 
$
39.19

 
28,000

 
$
39.19

$9.24 - $39.19
 
5,379,768

 
4.07
 
$
19.38

 
4,723,734

 
$
19.25
Summary of restricted stock unit activity
The following table summarizes RSUs and PRSUs activity during the fiscal years ended June 30, 2020 and 2019 under all plans: 
 
 
Time-based RSUs Outstanding
 
Weighted
Average
Grant-Date Fair Value per Share
 
PRSUs Outstanding
 
 
Weighted
Average
Grant-Date Fair Value per Share
Balance as of June 30, 2017
 
1,226,357

 
$
26.11

 
—

 
 
 
Granted
 
986,680

 
$
21.90

 
120,000

(1)
 
$
27.10

Released (2)
 
(572,789
)
 
$
26.34

 
—

 
 
 
Forfeited
 
(159,643
)
 
$
24.90

 
—

 
 
 
Balance as of June 30, 2018
 
1,480,605

 
$
23.34

 
120,000

 
 
$
27.10

Granted
 
1,086,911

 
$
18.37

 
—

 
 
 
Released (2)
 
(549,886
)
 
$
24.87

 
—

 
 
 
Forfeited
 
(144,528
)
 
$
20.25

 
—

 
 
 
Balance as of June 30, 2019
 
1,873,102

 
$
20.25

 
120,000

 
 
$
27.10

Granted
 
943,650

 
$
20.45

 
30,000

 
 
$
20.37

Released (2)
 
(871,274
)
 
$
20.97

 
(108,000
)
 
 
$
27.10

Forfeited
 
(177,451
)
 
$
19.49

 
—

 
 
 
Balance as of June 30, 2020
 
1,768,027

 
$
20.08

 
42,000

 
 
$
22.29


__________________________
(1)
Reflects the number of PRSUs that have been earned based on the achievement of performance metrics.
(2)
The number of shares released excludes 172,857 RSUs that were vested but not released in fiscal year 2019. The number of vested but not released RSUs for fiscal year 2020 was not material. The number of shares released also excludes 24,000 and 60,000 PRSUs that were vested but not released in fiscal years 2019 and 2018, respectively. These vested RSUs and PRSUs were primarily released in fiscal year 2020 and included in fiscal year 2020 number upon the effectiveness of the Company's registration statement on Form S-8.