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STOCKHOLDERS' EQUITY (Tables)
 3 Months Ended
Mar. 31, 2016
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 three months ended March 31, 2016 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 as of January 1, 2016
4,345,334

—

4,345,334

$10.68
 
 
Forfeited or canceled
(62,766
)
—

(62,766
)
$15.78
 
 
Options outstanding as of March 31, 2016
4,282,568

—

4,282,568

$10.61
3.57
$0
Options vested as of March 31, 2016 or expected to vest
 
 
4,245,004

$10.63
3.55
$0
Options exercisable as of March 31, 2016
 
 
3,729,795

$11.06
3.35
$0
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 three months ended March 31, 2016 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 as of January 1, 2016
905,934

360,074

1,266,008

$9.97
 
 
Granted
546,418

489,482

1,035,900

$7.04
 
 
Vested
(149,806
)
—

(149,806
)
$13.45
 
 
Forfeited
(50,917
)
(41,010
)
(91,927
)
$6.28
 
 
Non-vested as of March 31, 2016
1,251,629

808,546

2,060,175

$8.41
1.07
$13,906
Expected to vest
 
 
1,590,942

$8.48
1.02
$10,739
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 months ended March 31, 2016 and 2015 (in thousands):
 
Three Months Ended March 31,
 
2016
 
2015
Cost of products revenues
$
30

 
$
95

Cost of services revenues
149

 
159

Research and development expenses
85

 
107

Marketing and selling expenses
441

 
690

General and administrative expenses
1,393

 
1,410

 
$
2,098

 
$
2,461