Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Stock-based Compensation (Tables)

v3.19.1
Note 10 - Stock-based Compensation (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Share-based Payment Arrangement, Option, Activity [Table Text Block]
Option numbers are in (000’s)                        
              Three months ended
March 31, 2019
       Weighted
average
 
     
Options
     
Weighted
average
exercise price
      remaining
contractual
life (years)
 
                         
Outstanding, beginning of period    
4,489
    $
3.11
     
 
 
Granted    
1,414
     
1.91
     
 
 
Forfeited    
(119
)    
2.67
     
 
 
Outstanding, end of the period    
5,784
     
2.86
     
8.1
 
Exercisable, end of the period    
3,237
     
3.33
     
7.2
 
Vested and expected to vest, end of period    
5,400
     
2.90
     
8.0
 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
     
Three months ended

March 31, 2019
     
Three months ended

March 31, 2018
 
                 
Risk-free interest rate    
2.41
%    
2.39
%
Expected dividend yield    
     
 
Expected volatility    
84.0
%    
93.9
%
Expected life of options (in years)    
5
     
5
 
Grant date fair value   $
1.29
    $
2.14
 
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
     
Three months ended

March 31, 2019
     
Three months ended

March 31, 2018
 
                 
Research and development   $
118
    $
367
 
General and administrative    
544
     
1,861
 
Total   $
662
    $
2,228