STOCK CAPITAL (Tables)
 12 Months Ended
Dec. 31, 2017
Stockholders' Equity Note [Abstract]  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
The following table sets forth the number, exercise price and expiration date of the warrants outstanding as of December 31, 2017:
 
Issuance Date
 
Outstanding As Of
December 31, 2017
 
 
 
Exercise price
 
 
Exercisable Through
 
 
 
 
 
 
 
 
 
Nov-08
 
 
6,666
 
 
 
2.25
 
 
Sep-18
Apr-Oct   2009
 
 
20,000
 
 
 
1.005 - 1.5
 
 
Apr-Oct  2019
Aug 2007- Jan 2011
 
 
2,016,666
 
 
 
3 - 4.35
 
 
Nov-22
Jan-15
 
 
3,858,201
 
 
 
6.5
 
 
Jun-18
 
 
 
5,901,533
 
 
 
 
 
 
 
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
 
A summary of the Company's option activity related to options to employees and directors, and related information is as follows:
 
 
 
For the year ended
December 31, 2017
 
For the year ended
December 31, 2016
 
 
 
Amount of
options
 
Weighted
average
exercise
price
 
Aggregate
intrinsic
value
 
Amount of
options
 
Weighted
average
exercise
price
 
Aggregate
intrinsic
value
 
 
 
 
 
 
$
 
$
 
 
 
 
$
 
$
Outstanding at beginning of period
 
 
874,841
 
 
2.1258
 
 
 
 
 
1,002,451
 
 
2.6072
 
 
 
 
Granted
 
 
240,446
 
 
3.5178
 
 
 
 
 
70,667
 
 
0.75
 
 
 
 
Exercised
 
 
(129,888)
 
 
3.9175
 
 
 
 
 
-
 
 
-
 
 
 
 
Cancelled
 
 
(44,445)
 
 
1.6104
 
 
 
 
 
(198,277)
 
 
4.0691
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Outstanding at end of period
 
 
940,954
 
 
2.4681
 
 
1,366,213
 
 
874,841
 
 
2.1258
 
 
362,336
 
Vested and expected-to-vest at end of period
 
 
811,824
 
 
2.3317
 
 
1,289,457
 
 
839,509
 
 
2.1837
 
 
299,088
 
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]
The options outstanding as of December 31, 2017 and December 31, 2016, have been separated into exercise prices, as follows:
 
 
 
 
 
 
 
 
 
Weighted average
remaining
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
contractual
 
 
 
 
 
 
 
 
 
Options outstanding
 
Life - Years
 
Options exercisable as of
 
Exercise price
 
As of December 31,
 
As of December 31,
 
As of December 31,
 
$
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
0.75
 
 
213,333
 
 
213,665
 
 
6.99
 
 
8.67
 
 
177,889
 
 
178,333
 
1.005
 
 
5,333
 
 
6,445
 
 
1.50
 
 
2.50
 
 
5,333
 
 
6,445
 
2.25
 
 
69,889
 
 
137,000
 
 
3.57
 
 
4.72
 
 
69,889
 
 
137,000
 
2.45
 
 
369,619
 
 
369,619
 
 
7.75
 
 
8.75
 
 
369,619
 
 
369,619
 
2.70
 
 
82,667
 
 
93,333
 
 
5.65
 
 
6.54
 
 
82,667
 
 
93,333
 
3.17
 
 
-
 
 
25,779
 
 
-
 
 
0.12
 
 
-
 
 
25,779
 
3.90
 
 
15,000
 
 
15,000
 
 
4.59
 
 
5.59
 
 
15,000
 
 
15,000
 
4.18
 
 
47,847
 
 
-
 
 
1.18
 
 
-
 
 
47,847
 
 
-
 
4.3
 
 
93,686
 
 
-
 
 
9.89
 
 
-
 
 
-
 
 
-
 
4.80
 
 
2,000
 
 
2,000
 
 
2.11
 
 
3.11
 
 
2,000
 
 
2,000
 
4.81
 
 
41,580
 
 
-
 
 
1.56
 
 
-
 
 
41,580
 
 
-
 
5.85
 
 
-
 
 
6,000
 
 
-
 
 
0.5
 
 
-
 
 
6,000
 
7.05
 
 
-
 
 
6,000
 
 
-
 
 
0.22
 
 
-
 
 
6,000
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
940,954
 
 
874,841
 
 
6.59
 
 
7.38
 
 
811,824
 
 
839,509
 
Stock Based Compensation Expense [Table Text Block]
The fair value of the options is estimated at the date of grant using Black-Scholes options pricing model with the following assumptions used in the calculation: 
 
 
 
Year ended December 31,
 
 
 
2017
 
 
2016
 
 
 
 
 
 
 
 
 
 
Expected volatility
 
 
67%-70%
 
 
 
75%-77%
 
Risk-free interest
 
 
0.97%-2.13%
 
 
 
1.20% - 1.27%
 
Dividend yield
 
 
0%
 
 
 
0%
 
Expected life of up to (years)
 
 
5.5
 
 
 
5.25
 
Schedule Stock Awards Activity Related To Service Providers [Table Text Block]
The total stock-based compensation expense, related to shares, options and warrants granted to employees, directors and service providers was comprised, at each period, as follows:
 
 
 
Year ended
December 31,
 
 
 
2017
 
2016
 
 
 
 
 
 
 
 
 
Research and development
 
$
164
 
$
96
 
General and administrative
 
 
452
 
 
660
 
Total stock-based compensation expense
 
$
616
 
$
756