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STOCKHOLDERS' EQUITY (Tables)
12 Months Ended
Dec. 31, 2015
Stockholders' Equity Note [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
We used the Black-Scholes model with the following assumptions to determine the total fair value of $174,000 and $53,000 for options to purchase 1,210,000 and 223,000 shares of our common stock issued during 2015 and 2014, respectively.
 
 
 
2015
 
2014
 
Risk free interest rate
 
 
1.6
%
 
1.7
%
Volatility
 
 
100
%
 
100
%
Expected term from vesting
 
 
4.4 Years
 
 
4.2 Years
 
Dividend yield
 
 
0
%
 
0
%
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
A summary of option activity under our stock option plans for the years ended December 31, 2015 and 2014 is as follows:
 
 
 
2015
 
2014
 
 
 
 
 
 
 
 
 
 
 
 
Weighted
 
 
 
 
 
 
Weighted
 
 
 
Weighted
 
average
 
 
 
 
 
 
average
 
 
 
average
 
remaining
 
 
 
Number of
 
exercise
 
Number of
 
exercise
 
contractual term
 
 
 
Options
 
price
 
Options
 
price
 
(years)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Options outstanding at the beginning of the year:
 
 
3,022,706
 
$
1.06
 
 
3,225,806
 
$
1.52
 
 
 
 
Granted
 
 
1,210,000
 
$
0.22
 
 
223,000
 
$
0.27
 
 
 
 
Exercised
 
 
-
 
$
-
 
 
-
 
$
-
 
 
 
 
Expired / Forfeited
 
 
(70,000)
 
$
1.31
 
 
(426,100)
 
$
4.17
 
 
 
 
Outstanding at end of year
 
 
4,162,706
 
$
0.81
 
 
3,022,706
 
$
1.06
 
 
5.41
 
Options exercisable at year-end
 
 
4,031,039
 
$
0.83
 
 
3,015,374
 
$
1.06
 
 
5.28
 
Options vested and expected to vest at year end
 
 
4,075,808
 
$
0.82
 
 
3,017,685
 
$
1.06
 
 
5.29