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Note 15 - Supplemental Cash Flow Disclosures (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
   
Successor
Predecessor
  
   
Years Ended December 31,
  
   
2017
    
2016
    
2015
  
Cash paid for interest
   $
(926
)
   $
(19,153
)
   $
(64,950
)
Cash refunded from income taxes
   $
10,561
     $
14,943
     $
13,815
  
Cash paid for reorganization items
   $
—
     $
(24,719
)
   $
—
  
Non-cash investing and financing activity:
                        
Change in accrued capital expenditures
   $
202
     $
(3,182
)
   $
(42,793
)
Non-cash consideration for business acquisition
   $
138,166
     $
—
     $
735,125