NOTE 6 - STOCKHOLDERS' EQUITY (Tables)
|
9 Months Ended |
Sep. 30, 2016 |
|---|
| Stockholders' Equity Note [Abstract] |
|
| Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
The following assumptions were used in determining the fair value of employee and vesting non-employee options during the nine months ended September 30, 2016 and 2015:
|
|
September 30,
2016
|
|
September 30,
2015
|
|
|
Risk-free interest rate
|
|
|
1.38% - 1.73
|
%
|
|
|
1.68% - 2.07
|
%
|
|
Dividend yield
|
|
|
0
|
%
|
|
|
0
|
%
|
|
Stock price volatility
|
|
|
129.41%-134.81
|
%
|
|
|
123.08% -145.24
|
%
|
|
Expected life
|
5 – 9.9 years
|
|
5-10 years
|
|
|
Weighted average grant date fair value
|
|
$
|
0.94
|
|
|
$
|
5.90
|
|
|
| Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
The following table summarizes the stock option activity for the nine months ended September 30, 2016:
|
|
|
Shares
|
|
|
Weighted-Average
Exercise Price
|
|
|
Weighted Average
Remaining
Contractual Term
|
|
Aggregate
Intrinsic Value
|
|
|
Outstanding at January 1, 2016
|
|
|
629,628
|
|
|
$
|
7.59
|
|
|
|
4.5
|
|
|
|
|
Granted
|
|
|
388,495
|
|
|
$
|
1.28
|
|
|
|
10.0
|
|
|
|
|
Canceled/expired
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Outstanding at September 30, 2016
|
|
|
1,018,123
|
|
|
$
|
5.18
|
|
|
|
5.9
|
|
|
$
|
50
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Exercisable at September 30, 2016
|
|
|
905,854
|
|
|
$
|
5.28
|
|
|
|
5.5
|
|
|
$
|
4
|
|
|
| Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
The following table presents information related to stock options at September 30, 2016:
|
Options Outstanding
|
|
|
Options Exercisable
|
|
|
Exercise
Price
|
|
|
Number of
Options
|
|
|
Weighted Average
Remaining Life
In Years
|
|
|
Exercisable
Number of
Options
|
|
|
$
|
0.00-5.00
|
|
|
|
611,440
|
|
|
|
7.5
|
|
|
|
552,169
|
|
| |
5.01-12.50
|
|
|
|
382,675
|
|
|
|
3.6
|
|
|
|
329,677
|
|
| |
12.51-25.00
|
|
|
|
15,008
|
|
|
|
3.5
|
|
|
|
15,008
|
|
| |
25.01-45.00
|
|
|
|
9,000
|
|
|
|
3.1
|
|
|
|
9,000
|
|
| |
|
|
|
|
1,018,123
|
|
|
|
5.9
|
|
|
|
905,854
|
|
|
| Schedule of Outstanding Warrants [Table Text Block] |
The following table summarizes information with respect to outstanding warrants to purchase common stock of the Company, all of which were exercisable, at September 30, 2016:
|
Exercise
Price
|
|
|
Number
Outstanding
|
|
Expiration Date
|
|
$
|
1.25
|
|
|
$
|
117,648
|
|
March 2021
|
| |
2.13
|
|
|
|
609,756
|
|
April 2021
|
| |
4.75
|
|
|
|
482,500
|
|
Sept/Oct 2020
|
| |
|
|
|
|
1,209,904
|
|
|
|
| Schedule of Warrants Activity [Table Text Block] |
The following table summarizes the warrant activity for the nine months ended September 30, 2016:
|
|
|
Shares
|
|
|
Weighted-Average
Exercise Price
|
|
|
Weighted-Average
Remaining
Contractual Term
|
|
Aggregate
Intrinsic
Value
|
|
|
Outstanding at January 1, 2016
|
|
|
703,413
|
|
|
$
|
4.83
|
|
|
|
3.5
|
|
|
|
|
Grants
|
|
|
727,404
|
|
|
$
|
1.99
|
|
|
|
5.0
|
|
|
|
|
Exercised
|
|
|
-
|
|
|
|
|
|
|
|
|
|
|
|
|
Forfeitures or expirations
|
|
|
(220,913
|
)
|
|
$
|
5.00
|
|
|
|
|
|
|
|
|
Outstanding at September 30, 2016
|
|
|
1,209,904
|
|
|
$
|
3.09
|
|
|
|
4.3
|
|
|
$
|
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Exercisable at September 30, 2016
|
|
|
1,209,904
|
|
|
$
|
3.09
|
|
|
|
4.3
|
|
|
$
|
-
|
|
|