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STOCKHOLDERS' EQUITY Share-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2018
Share-based Compensation, Stock Options, Activity [Table Text Block]
Information with respect to option shares granted under all of our stock incentive plans for the six months ended June 30, 2018 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, 2018
2,290,017

—

2,290,017

$9.65
 
 
Granted
—

—

—

$—
 
 
Exercised
—

—

—

$—
 
 
Forfeited or canceled
(1,347,040
)
—

(1,347,040
)
$10.47
 
 
Options outstanding at June 30, 2018
942,977

—

942,977

$8.49
2.11
$—
Options vested at June 30, 2018 or expected to vest
 
 
942,977

$8.49
2.11
$—
Options exercisable at June 30, 2018
 
 
942,977

$8.49
2.11
$—
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
Information with respect to our non-vested restricted stock units for the six months ended June 30, 2018 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, 2018
1,809,138

1,254,110

3,063,248

$5.10
 
 
Granted
1,218,706

732,884

1,951,590

$4.63
 
 
Vested
(437,570
)
—

(437,570
)
$5.63
 
 
Forfeited
(841,460
)
(1,059,091
)
(1,900,551
)
$5.02
 
 
Non-vested at June 30, 2018
1,748,814

927,903

2,676,717

$4.73
1.21
$13,892
Expected to vest
 
 
2,356,699

$4.85
1.21
$12,231
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 our condensed consolidated statements of operations for the three and six months ended June 30, 2018 and 2017 (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018

2017
 
2018
 
2017
Cost of products revenues
$
24

 
$
10

 
$
43

 
$
25

Cost of services revenues
50

 
410

 
84

 
459

Research and development expenses
51

 
164

 
203

 
252

Marketing and selling expenses
373

 
437

 
733

 
793

General and administrative expenses
1,054

 
961

 
1,192

 
1,864

 
$
1,552

 
$
1,982

 
$
2,255

 
$
3,393