XML 37 R27.htm IDEA: XBRL DOCUMENT v3.7.0.1
Note 12 - Stock-based Compensation (Tables)
 3 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Share-based Compensation Stock Options and Restricted Stock Awards Activity [Table Text Block]
 
 
Stock Options
 
 
Restricted Stock
Awards
 
 
Weighted
Average
 
Equity Awards
 
Options
Outstanding
 
 
Weighted
Average
Exercise
Price
 
 
Non-vested
Restricted
Stock
Outstanding
 
 
Weighted
Average
Grant
Date
Fair Value
 
 
Contractual
Terms of
Equity
Awards
(in years)
 
                                         
Equity awards outstanding at December 31, 2016
    
2,932,663
     $
4.31
      
67,000
     $
2.67
      
 
  
                                         
Equity awards forfeited, cancelled or expired
    
(454,207
)
   $
13.15
      
(20,000
)
    
1.87
      
 
  
                                         
Equity awards outstanding at March 31, 2017
    
2,478,456
     $
2.69
      
47,000
     $
3.01
      
6.8
  
                                         
Aggregate intrinsic value of outstanding awards at March 31, 2017
   $
–
      
 
     $
13,630
      
 
      
 
  
                                         
Equity awards exercisable at March 31, 2017
    
2,033,373
     $
2.60
      
 
      
 
      
7.5
  
                                         
Aggregate intrinsic value of awards exercisable at March 31, 2017
   $
–
      
 
      
 
      
 
      
 
  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
 
 
Three
Months Ended
March 31,
2016
 
Risk-free interest rate
    
1.87
%
Expected volatility
    
89.1
%
Expected life (in years)
    
10.00
  
Expected forfeiture rate
    
10
%
Expected dividend yield
    
0.0
%