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STOCK OPTIONS (Tables)
 12 Months Ended
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of stock options and stock awards
The status of our stock options and stock awards are summarized as follows:
 
Number of options
 
Weighted average exercise price
Outstanding at December 31, 2015
3,131,447

 
$
3.38

Granted
810,762

 
1.87

Exercised
(36,250
)
 
3.62

Canceled and forfeited
(153,750
)
 
3.69

Outstanding at December 31, 2016
3,752,209

 
$
3.04

Granted
1,728,000

 
3.09

Exercised
(176,750
)
 
2.41

Canceled and forfeited
(443,302
)
 
3.95

Outstanding at December 31, 2017
4,860,157

 
$
3.00

Granted
225,000

 
2.40

Exercised
(1,378,615
)
 
2.43

Canceled and forfeited
(225,841
)
 
2.10

Outstanding at December 31, 2018
3,480,701

 
$
3.10

 
 
 
 
Exercisable at December 31, 2018
2,129,581

 
$
3.20
Number of weighted average grant-date fair values of options
 
Number of options
 
Weighted average grant date fair value
Non-vested at December 31, 2017
2,232,435

 
$
1.40

Granted
225,000

 
2.40

Vested
(880,474
)
 
1.63

Forfeited
(225,841
)
 
2.10

Non-vested at December 31, 2018
1,351,120

 
$
1.48
Schedule of option fair value assumptions
 
2018 Grants
 
2017 Grants
 
2016 Grants
Option value
$1.46
-
$3.04
 
$1.73
-
$2.34
 
$0.80
-
$0.91
Risk-free rate
1.9%
-
2.5%
 
1.5%
-
1.9%
 
1.5%
 
1.8%
Expected dividend yield
—%
 
—%
 
—%
Expected volatility
60.9%
-
68.8%
 
62.1%
-
68.0%
 
49.5%
-
50.3%
Expected term (in years)
6
 
6
 
6
Allocation of stock based compensation
Allocation of stock based compensation from continuing operations expense was as follows:
 
Year Ended December 31,
(In thousands)
2018
 
2017
 
2016
Cost of sales
$
—

 
$
—

 
$
2

Research and development
25

 
27

 
27

Salaries and related costs
1,500

 
844

 
780

Total
$
1,525

 
$
871

 
$
809