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Share-based Compensation (Tables)
 12 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Summary of Stock Option Activities
The following table summarizes the Company's stock option activities:
 
 
 
 
 
Weighted
 
 
 
 
 
Weighted
 
Average
 
 
 
 
 
Average
 
Remaining
 
 
 
Number of
 
Exercise Price
 
Contractual
 
Aggregate
 
Shares
 
Per Share
 
Term (in years)
 
Intrinsic Value
 
 
 
 
 
 
 
 
Outstanding at June 30, 2017
1,053,367

 
$
10.98

 
4.43
 


Granted
—

 
$
—

 
 
 
 
Exercised
(166,389
)
 
$
11.00

 
 
 
$
959,257

Canceled or forfeited
—

 
$
—

 
 
 
 
Outstanding at June 30, 2018
886,978

 
$
10.97

 
4.03
 
 
  Granted
—

 
$
—

 
 
 
 
  Exercised
(10,500
)
 
$
10.50

 
 
 
$
43,415

  Canceled or forfeited
—

 
$
—

 
 
 
 
Outstanding at June 30, 2019
876,478

 
$
10.98

 
3.06
 


Granted
—

 
$
—

 
 
 
 
Exercised
(2,500
)
 
$
10.50

 
 
 
$
4,726

Canceled or forfeited
(230,000
)
 
$
17.11

 
 
 
 
Outstanding at June 30, 2020
643,978

 
$
8.79

 
2.89
 
$
1,544,664

Options vested and expected to vest
643,978

 
$
8.79

 
2.89
 
$
1,544,664

Exercisable at June 30, 2020
643,978

 
$
8.79

 
2.89
 
$
1,544,664
Shares Authorized under Stock Option Plans, by Exercise Price Range
Information with respect to stock options outstanding and exercisable as of June 30, 2020 is as follows:
 
 
Options Outstanding  
 
Options Exercisable  
Range of Exercise Prices 
 
Number
Outstanding
 
Weighted-Average
Remaining Contractual Life  (Years)
 
Weighted-Average
Exercise Price
 
Number
Exercisable
 
Weighted-Average
Exercise Price  
$7.21 - $7.21
 
6,875

 
3.58
 
$
7.21

 
6,875

 
$
7.21

$7.44 - $7.44
 
331,139

 
3.71
 
$
7.44

 
331,139

 
$
7.44

$7.56 - $9.19
 
132,150

 
3.14
 
$
8.47

 
132,150

 
$
8.47

$9.90 - $12.68
 
168,000

 
1.11
 
$
11.64

 
168,000

 
$
11.64

$12.91 - $12.91
 
5,814

 
0.79
 
$
12.91

 
5,814

 
$
12.91

$7.21 - $12.91
 
643,978

 
2.89
 
$
8.79

 
643,978

 
$
8.79
Restricted Stock Units Activity
The following table summarizes the Company's TRSU activities:
 
 
 
Number of Restricted Stock
Units
 
Weighted Average
Grant Date Fair
Value Per Share
 
Weighted Average
Remaining
Recognition
Period (Years)
 
Aggregate Intrinsic Value
Nonvested at June 30, 2017
 
974,365

 
$
13.51

 
1.68
 
$
16,244,748

Granted
 
482,397

 
$
16.46

 
 
 
 
Vested
 
(468,051
)
 
$
13.24

 
 
 
 
Forfeited
 
(69,688
)
 
$
14.25

 
 
 
 
Nonvested at June 30, 2018

919,023

 
$
15.14

 
1.62
 
$
13,086,888

Granted
 
527,022

 
$
11.28

 
 
 
 
Vested
 
(499,954
)
 
$
13.09

 
 
 
 
Forfeited
 
(39,750
)
 
$
13.82

 
 
 
 
Nonvested at June 30, 2019
 
906,341

 
$
14.09

 
1.62
 
$
8,465,225

Granted
 
505,440

 
$
8.51

 
 
 
 
Vested
 
(455,893
)
 
$
13.53

 
 
 
 
Forfeited
 
(23,750
)
 
$
13.19

 
 
 
 
Nonvested at June 30, 2020
 
932,138

 
$
11.36

 
1.66
 
10,141,661


The following table summarizes the Company's PRSU activities:
 
 
Number of Performance-based Restricted Stock
Units
 
Weighted Average
Grant Date Fair
Value Per Share
 
Weighted Average
Remaining
Recognition
Period (Years)
 
Aggregate Intrinsic Value
Nonvested at June 30, 2017
 
170,000

 
$
17.58

 
2.21
 
$
2,833,900

Granted
 
298,050

 
$
16.22

 
 
 
 
Vested
 
(38,247
)
 
$
17.58

 
 
 
 
Forfeited
 
(7,503
)
 
$
17.26

 
 
 
 
Nonvested at June 30, 2018
 
422,300

 
$
16.63

 
2.06
 
$
6,013,552

Granted
 
291,750

 
$
11.18

 
 
 
 
Vested
 
(111,623
)
 
$
16.68

 
 
 
 
Forfeited
 
(5,703
)
 
$
16.78

 
 
 
 
Nonvested at June 30, 2019
 
596,724

 
$
13.95

 
1.88
 
$
5,573,402

Granted
 
155,000

 
$
7.36

 
 
 
 
Vested
 
(110,659
)
 
$
16.68

 
 
 
 
Forfeited
 
(298,290
)
 
$
11.32

 
 
 
 
Nonvested at June 30, 2020
 
342,775

 
$
12.38

 
1.60
 
3,729,392
Employee Stock Purchase Plan, Valuation Assumptions
The ESPP is compensatory and results in compensation expense. The fair values of common shares to be issued under the ESPP were determined using the Black-Scholes option pricing model with the following assumptions:
 
Year Ended June 30,
 
2020
 
2019
 
2018
Volatility rate
46.4% - 58.3%
 
40.1% - 40.7%
 
42.1% - 45.3%
Risk-free interest rate
0.2% - 1.6%
 
2.1% - 2.9%
 
1.4% - 2.6%
Expected term
1.3 years
 
1.3 years
 
1.3 years
Dividend yield
—%
 
—%
 
—%
Share-based Compensation, Allocation of Recognized Period Costs
Share-based Compensation Expenses
The total share-based compensation expense related to TRSU, PSUs, MSUs, stock options and ESPP described above, recognized in the consolidated statements of operations for the years presented was as follows:
 
Year Ended June 30,
 
2020
 
2019
 
2018
 
(in thousands)
Cost of goods sold
$
1,530

 
$
1,963

 
$
1,641

Research and development
2,895

 
2,453

 
1,855

Selling, general and administrative
6,029

 
8,761

 
7,916

 
 
 
 
 
 
 
$
10,454

 
$
13,177

 
$
11,412