v3.8.0.1
Note 19 - Unaudited Quarterly Financial Data (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Quarterly Financial Information [Table Text Block]
   
201
7
    
201
6
  
   
Q1
    
Q2
    
Q3
    
Q4
    
Q1
    
Q2
    
Q3
    
Q4
  
Revenues
   $
3,109
     $
2,659
     $
1,487
     $
740
     $
3,025
     $
4,531
     $
3,366
     $
6,435
  
Operating costs and expenses
   $
15,182
     $
12,600
     $
10,348
     $
8,547
     $
11,547
     $
12,853
     $
11,341
     $
13,573
  
Net income / (loss)
   $
(15,551
 )   $
(13,059
 )   $
(13,013
 )   $
(9,885
 )   $
(10,981
 )   $
(11,092
 )   $
(11,402
 )   $
( 9,682
 )
Net income / (loss) per share (basic)
   $
(0.34
 )   $
(0.29
 )   $
(0.28
 )   $
(0.20
 )   $
(0.24
 )   $
(0.24
 )   $
(0.25
 )   $
(0.21
 )
Net income / (loss) per share (diluted)
   $
(0.34
 )   $
(0.29
 )   $
(0.28
 )   $
(0.20
 )   $
(0.25
 )   $
(0.24
 )   $
(0.25
 )   $
(0.21
 )