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STOCKHOLDERS' EQUITY (Tables)
 6 Months Ended
Jun. 30, 2015
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
Information with respect to option shares granted under all the Company’s stock incentive plans for the six months ended June 30, 2015 was as follows:
 
Time-Based Shares
Performance-Based Shares
Total Shares
Weighted-
Average
Exercise
Price
Weighted-
Average
Remaining
Contractual
Term (years)
Aggregate
Intrinsic
Value
(in thousands)
Options outstanding at January 1, 2015
5,564,111

—

5,564,111

$11.20
 
 
Granted
—

—

—

$—
 
 
Exercised
(196,486
)
—

(196,486
)
$11.64
 
 
Forfeited or canceled
(140,762
)
—

(140,762
)
$17.98
 
 
Options outstanding at June 30, 2015
5,226,863

—

5,226,863

$11.00
4.39
$20,155
Options vested at June 30, 2015 or expected to vest
 
 
5,099,932

$11.08
4.35
$19,443
Options exercisable at June 30, 2015
 
 
3,815,010

$12.17
3.92
$12,375
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
Information with respect to the Company’s non-vested restricted stock units for the six months ended June 30, 2015 was as follows:
 
Non-Vested Restricted Stock Units
 
Time-Based Shares
Performance-Based Shares
Total Shares
Weighted-
Average
Grant-Date
Fair Value
Weighted-
Average
Remaining
Contractual
Term (years)
Aggregate
Intrinsic
Value
(in thousands)
Non-vested at January 1, 2015
811,880

—

811,880

$10.01
 
 
Granted
374,195

347,295

721,490

$15.19
 
 
Vested
(333,012
)
—

(333,012
)
$10.18
 
 
Forfeited
(210,272
)
(38,625
)
(248,897
)
$11.62
 
 
Non-vested at June 30, 2015
642,791

308,670

951,461

$13.46
0.93
$12,683
Expected to vest
 
 
864,317

$13.44
0.89
$11,521
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
Stock-based compensation was included in the following captions in the Company’s condensed consolidated statements of operations for the three and six months ended June 30, 2015 and 2014 (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2015
 
2014
 
2015
 
2014
Cost of products revenues
$
40

 
$
65

 
$
135

 
$
141

Cost of services revenues
175

 
98

 
334

 
175

Research and development expenses
46

 
113

 
152

 
240

Marketing and selling expenses
683

 
642

 
1,373

 
934

General and administrative expenses
1,938

 
1,218

 
3,350

 
1,908

 
$
2,882

 
$
2,136

 
$
5,344

 
$
3,398