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STOCKHOLDERS’ EQUITY (Tables)
 12 Months Ended
Dec. 31, 2017
Schedule of stock warrant activity
A summary of stock warrant activity for the years ended December 31, 2017 and 2016 are presented below:
 
 
 
Number of 
Warrants
(in thousands)
 
Weighted
Average
Exercise 
Price
 
Weighted
Average
Remaining
Contractual
Life (Years)
 
Aggregate
Intrinsic
Value
(in thousands)
 
Outstanding at December 31, 2015
 
 
-
 
$
-
 
 
 
 
$
-
 
Granted
 
 
52
 
$
0.21
 
 
 
 
 
 
 
Exercised
 
 
-
 
 
-
 
 
 
 
 
 
 
Forfeited
 
 
-
 
$
-
 
 
 
 
 
 
 
Outstanding at December 31, 2016
 
 
52
 
$
0.21
 
 
4.37
 
$
5
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Outstanding at December 31, 2016
 
 
52
 
$
0.21
 
 
 
 
 
 
 
Granted
 
 
150
 
$
2.42
 
 
 
 
 
 
 
Exercised
 
 
(2)
 
$
0.35
 
 
 
 
 
 
 
Forfeited/Canceled
 
 
-
 
$
-
 
 
 
 
 
 
 
Outstanding at December 31, 2017
 
 
200
 
$
1.86
 
 
5.80
 
$
264
 
Exercisable at December 31, 2017
 
 
200
 
$
1.86
 
 
5.80
 
 
 
 
Warrant [Member]  
Schedule of black scholes option pricing model to determine the fair value of common stock warrants
The Company uses the Black Scholes option pricing model to determine the fair value of common stock warrants, using the following assumptions during the years ended December 31, 2017 and 2016:
 
 
 
2017
 
 
2016
 
Weighted average expected term
 
 
4.38 years
 
 
 
5.0 years
 
Weighted average volatility
 
 
136.62
%
 
 
122.44
%
Weighted average risk-free interest rate
 
 
1.51
%
 
 
1.48
%
Dividend yield
 
 
0
%
 
 
1.44
%