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Share-Based Payments (Tables)
 12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement [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,
 
2019
 
2018
 
2017
Cost of products
$
20

 
$
78

 
$
116

Cost of services
220

 
237

 
322

Research and development
4,784

 
6,850

 
7,654

Selling, general and administrative
11,419

 
25,259

 
28,801

Discontinued operations
2,507

 
3,872

 
4,683

Total
$
18,950

 
$
36,296

 
$
41,576
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, 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
Granted
1,556,575

 
6.52

 
 
Exercised
(19,887
)
 
(3.17
)
 
 
Forfeited
(1,236,326
)
 
(24.92
)
 
 
Expired
(2,371,143
)
 
(38.53
)
 
 
Balances at December 31, 2019
9,022,282

 
21.94

 
6.10
Exercisable at December 31, 2019
6,264,194

 
24.89

 
5.20
Summary of Information About Stock Options Outstanding
The following table summarizes additional information about stock options outstanding as of December 31, 2019:
 
 
 
 
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

—
$
8.60

 
1,612,219

 
$
6.40

 
8.08
 
$
473

 
585,144

 
$
5.61

 
5.95
 
$
194

$
8.77

—
$
20.68

 
1,278,121

 
15.55

 
6.53
 
—

 
753,064

 
15.89

 
5.20
 
—

$
20.94

 
 
 
1,646,500

 
20.94

 
6.51
 
—

 
892,000

 
20.94

 
6.02
 
—

$
21.00

—
$
29.47

 
1,976,645

 
23.71

 
6.06
 
—

 
1,585,940

 
23.71

 
5.79
 
—

$
29.56

—
$
65.08

 
2,508,797

 
34.46

 
4.38
 
—

 
2,448,046

 
34.47

 
4.33
 
—

 
 
 
 
9,022,282

 
$
21.94

 
6.10
 
$
473

 
6,264,194

 
$
24.89

 
5.20
 
$
194

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
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
Granted
2,278,460

 
6.59

 
 
Vested
(1,159,165
)
 
(8.74
)
 
 
Forfeited
(307,654
)
 
(8.99
)
 
 
Balances at December 31, 2019
1,781,982

 
8.71

 
1.24