NOTE 6 - STOCKHOLDERS' EQUITY (Tables)
|
6 Months Ended |
Jun. 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 six months ended June 30, 2016 and 2015:
|
|
June 30,
2016
|
|
June 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
|
%
|
|
|
123.45% -145.24
|
%
|
|
Expected life
|
5 – 9.8 years
|
|
5-10 years
|
|
|
Weighted average grant date fair value
|
|
$
|
0.97
|
|
|
$
|
5.98
|
|
|
| Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
The following table summarizes the stock option activity for the six months ended June 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
|
|
|
383,495
|
|
|
$
|
1.29
|
|
|
|
10.0
|
|
|
|
|
Canceled/expired
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Outstanding at June 30, 2016
|
|
|
1,013,123
|
|
|
$
|
5.20
|
|
|
|
6.1
|
|
|
$
|
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Exercisable at June 30, 2016
|
|
|
883,629
|
|
|
$
|
5.30
|
|
|
|
5.7
|
|
|
$
|
-
|
|
|
| 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 June 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
|
|
|
|
606,440
|
|
|
|
7.7
|
|
|
|
541,439
|
|
| |
5.01-12.50
|
|
|
|
382,675
|
|
|
|
3.9
|
|
|
|
318,182
|
|
| |
12.51-25.00
|
|
|
|
15,008
|
|
|
|
3.7
|
|
|
|
15,008
|
|
| |
25.01-45.00
|
|
|
|
9,000
|
|
|
|
3.3
|
|
|
|
9,000
|
|
| |
|
|
|
|
1,013,123
|
|
|
|
6.2
|
|
|
|
883,629
|
|
|
| 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 June 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
|
| |
5.00
|
|
|
|
220,913
|
|
August 2016
|
| |
|
|
|
|
1,430,817
|
|
|
|
| Schedule of Warrants Activity [Table Text Block] |
The following table summarizes the warrant activity for the six months ended June 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
|
|
|
-
|
|
|
|
|
|
|
|
|
|
|
|
|
Outstanding at June 30, 2016
|
|
|
1,430,817
|
|
|
$
|
3.38
|
|
|
|
3.9
|
|
|
$
|
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Exercisable at June 30, 2016
|
|
|
1,430,817
|
|
|
$
|
3.38
|
|
|
|
3.9
|
|
|
$
|
-
|
|
|