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Share-Based Payments (Tables)
 12 Months Ended
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock-based Compensation Expense
Stock-based compensation costs included in the consolidated statements of operations are presented below:
 
Year Ended December 31,
 
2018
 
2017
 
2016
Cost of products
$
78

 
$
116

 
$
81

Cost of services
237

 
322

 
274

Research and development
9,676

 
9,336

 
9,251

Selling, general and administrative
26,305

 
31,802

 
32,596

Total
$
36,296

 
$
41,576

 
$
42,202
Schedule of Stock Option Activity
Stock option activity was as follows:
 
Number of Shares
 
Weighted Average Exercise Price
 
Weighted Average Remaining Contractual Term (Years)
Balances at December 31, 2015
11,043,528

 
$
32.66

 
8.49
Granted
4,644,860

 
29.39

 
 
Exercised
(1,210,840
)
 
(15.83
)
 
 
Forfeited
(2,760,809
)
 
(40.34
)
 
 
Expired
(76,356
)
 
(37.81
)
 
 
Balances at December 31, 2016
11,640,383

 
31.25

 
8.21
Granted
3,920,950

 
21.47

 
 
Adjustment due to dividend (Note 14)
46,766

 
31.11

 
 
Exercised
(149,429
)
 
(6.37
)
 
 
Forfeited
(3,797,105
)
 
(28.37
)
 
 
Expired
(278,818
)
 
(33.18
)
 
 
Balances at December 31, 2017
11,382,747

 
28.99

 
7.32
Granted
1,470,339

 
14.26

 
 
Exercised
(45,159
)
 
(6.59
)
 
 
Forfeited
(929,596
)
 
(21.48
)
 
 
Expired
(785,268
)
 
(26.25
)
 
 
Balances at December 31, 2018
11,093,063

 
27.95

 
6.81
Exercisable at December 31, 2018
7,002,519

 
30.37

 
5.97
Summary of Information About Stock Options Outstanding
The following table summarizes additional information about stock options outstanding as of December 31, 2018:
 
 
 
 
Options Outstanding
 
Options Exercisable
Range of Exercise Prices
 
Number of Options
 
Weighted Average Exercise Price
 
Weighted Average Remaining Life (Years)
 
Aggregate Intrinsic Value
 
Number of Options
 
Weighted Average Exercise Price
 
Weighted Average Remaining Life (Years)
 
Aggregate Intrinsic Value
$
3.17

—
$
19.52

 
1,973,818

 
$
13.70

 
7.54
 
$
169

 
833,007

 
$
12.80

 
4.85
 
$
169

$
19.85

—
$
20.94

 
1,914,763

 
20.93

 
7.99
 
—

 
500,263

 
20.92

 
7.67
 
—

$
21.00

—
$
27.08

 
2,057,126

 
23.29

 
7.26
 
—

 
1,248,370

 
23.01

 
6.69
 
—

$
27.10

—
$
29.56

 
2,666,109

 
29.19

 
5.28
 
—

 
2,593,151

 
29.20

 
5.23
 
—

$
29.58

—
$
65.08

 
2,481,247

 
47.24

 
6.59
 
—

 
1,827,728

 
47.65

 
6.54
 
—

 
 
 
 
11,093,063

 
$
27.95

 
6.81
 
$
169

 
7,002,519

 
$
30.37

 
5.97
 
$
169

The following table summarizes additional information about stock options outstanding as of December 31, 2017:
 
 
 
 
Options Outstanding
 
Options Exercisable
Range of Exercise Prices
 
Number of Options
 
Weighted Average Exercise Price
 
Weighted Average Remaining Life (Years)
 
Aggregate Intrinsic Value
 
Number of Options
 
Weighted Average Exercise Price
 
Weighted Average Remaining Life (Years)
 
Aggregate Intrinsic Value
$
2.64

—
$
9.30

 
453,371

 
$
7.06

 
3.94
 
$
2,020

 
453,371

 
$
7.06

 
3.94
 
$
2,020

$
12.50

—
$
21.38

 
3,158,121

 
20.58

 
8.74
 
—

 
456,942

 
19.52

 
7.13
 
—

$
21.43

—
$
28.81

 
3,399,721

 
25.55

 
6.91
 
—

 
1,804,401

 
25.86

 
5.69
 
—

$
28.88

—
$
40.99

 
2,751,716

 
32.07

 
6.70
 
—

 
1,732,250

 
31.51

 
6.32
 
—

$
41.41

—
$
65.08

 
1,619,818

 
53.52

 
7.42
 
—

 
859,733

 
53.07

 
7.38
 
—

 
 
 
 
11,382,747

 
$
28.99

 
7.32
 
$
2,020

 
5,306,697

 
$
29.96

 
6.14
 
$
2,020
Schedule of Restricted Stock Unit Activity
RSU activity was a follows:
 
Number of Restricted Stock Units
 
Weighted Average Grant Date Fair Value
 
Weighted Average Remaining Contractual Term (Years)
Balances at December 31, 2017
—

 
$
—

 
0.00
Granted
1,069,126

 
13.84

 
 
Vested
(25,000
)
 
(15.82
)
 
 
Forfeited
(73,785
)
 
(13.47
)
 
 
Balances at December 31, 2018
970,341

 
13.82

 
1.43