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Note 15 - Quarterly Financial Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Quarterly Financial Information [Table Text Block]
 
 
Quarters Ended
 
 
 
March 31,
2016
 
 
June 30,
2016
 
 
September 30,
2016
 
 
December 31,
2016
 
Revenue
   $
269,615
     $
225,168
     $
232,537
     $
243,822
  
Operating loss
    
(500,416
)
    
(182,437
)
    
(85,553
)
    
(101,602
)
Loss before reorganization items and income taxes
    
(522,560
)
    
(302,368
)
    
(86,636
)
    
(106,405
)
Net loss
    
(428,412
)
    
(291,116
)
    
(106,390
)
    
(118,371
)
Net loss per common share:
                                
Basic
   $
(3.65
)
   $
(2.46
)
   $
(0.90
)
   $
(1.00
)
Diluted
   $
(3.65
)
   $
(2.46
)
   $
(0.90
)
   $
(1.00
)
 
 
Quarters Ended
 
 
 
March 31,
2015
 
 
June 30,
2015
 
 
September 30,
2015
 
 
December 31,
2015
 
Revenue
   $
401,216
     $
511,165
     $
427,497
     $
409,011
  
Operating loss
    
(30,202
)
    
(77,350
)
    
(493,338
)
    
(497,432
)
Loss before income taxes
    
(35,556
)
    
(99,477
)
    
(524,378
)
    
(512,224
)
Net loss
    
(30,663
)
    
(65,121
)
    
(455,016
)
    
(321,742
)
Net loss per common share:
                                
Basic
   $
(0.51
)
   $
(0.56
)
   $
(3.89
)
   $
(2.75
)
Diluted
   $
(0.51
)
   $
(0.56
)
   $
(3.89
)
   $
(2.75
)