Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Summary of Stock Options (Tables)

v3.5.0.2
Note 8 - Summary of Stock Options (Tables)
6 Months Ended
Jun. 30, 2016
Notes Tables  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
 
 
Six Months Ended June 30, 2016
 
 
 
Number
of
Shares
 
 
Weighted
Average
Exercise
Price
 
 
Weighted
Average
Remaining
Contractual
Term (years)
 
 
 
Aggregate
Intrinsic
Value
(in thousands)
 
                                   
Options outstanding, beginning of period
    1,022,195     $ 6.47       9.37       $ -  
Options granted
    158,017     $ 6.57                    
Options exercised
    (3,020 )   $ 4.80                    
Options canceled
    (50,905 )   $ 7.60                    
Options outstanding, end of period
    1,126,287     $ 6.44       8.98  
 
  $ 46,238  
                                   
Vested and exercisable and expected to vest, end of period
    1,043,020     $ 6.48       8.95       $ 43,704  
                                   
Vested and exercisable, end of period
    227,781     $ 8.70       7.78       $ 14,653  
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]
 
 
 
 
Options Outstanding
 
 
Options Exercisable
 
Range of
Exercise Prices
 
Number
Outstanding
as of
June 30, 2016
 
 
Weighted
Average
Exercise
Price
 
 
Weighted
Average
Remaining
Contractual
Term (Years)
 
 
Number
Exercisable
as of
June 30, 2016
 
 
Weighted
Average
Exercise
Price
 
                                             
 
$2.64
      12,500     $ 2.64       8.87       3,646     $ 2.64  
$3.68
 -
$3.76     79,376     $ 3.75       8.61       26,459     $ 3.75  
 
$4.80
      203,496     $ 4.80       8.06       92,254     $ 4.80  
 
$6.00
      584,253     $ 6.00       9.43       58,068     $ 6.00  
$6.24
 -
$6.40     129,267     $ 6.35       9.66       -     $ -  
$7.00
 -
$7.92     70,625     $ 7.62       9.41       584     $ 7.74  
 
$9.92
      38,135     $ 9.92       6.40       38,135     $ 9.92  
$56.00
 -
$72.00     6,757     $ 69.71       1.14       6,757     $ 69.71  
$96.00
 -
$149.04     1,846     $ 118.68       1.48       1,846     $ 118.68  
 
$296.00
      32     $ 296.00       1.23       32     $ 296.00  
          1,126,287     $ 6.44       8.98       227,781     $ 8.70  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
 
 
Three Months Ended
June 30,
 
 
Six Months Ended
June 30,
 
 
 
2016
 
 
2015
 
 
2016
 
 
2015
 
                                 
Expected term (in years)
    5       5       5       5  
Average volatility
    47%       64%       65%       62%  
Risk-free interest rate
    1.26%       1.58%       1.53%       1.36%  
Dividend yield
    0%       0%       0%       0%  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
 
 
Three Months Ended
June 30,
 
 
Six Months Ended
June 30,
 
 
 
2016
 
 
2015
 
 
2016
 
 
2015
 
                                 
Research and development
  $ 28     $ 4     $ 49     $ 8  
Selling, general and administrative
    174       44       341       82  
Total
  $ 202     $ 48     $ 390     $ 90