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Note 3 - Fresh Start Accounting (Details Textual) - USD ($)
$ in Thousands
Sep. 30, 2017
Jan. 06, 2017
Jan. 01, 2017
Jul. 20, 2016
Conditions to Adopt Fresh Start Accounting, Percentage of Voting Shares of Successor Received By Holders of Predecessor Shares, Threshold   50.00%    
Restructuring Plan, Value, Maximum   $ 750,000   $ 750,000
Reorganization Value     $ 750,000  
Finite-Lived Intangible Assets, Gross $ 56,500   60,400  
Fresh-Start Adjustment, Increase (Decrease), Stockholders' Equity     (353,956)  
Customer Relationships [Member]        
Finite-Lived Intangible Assets, Gross $ 0    
Successor [Member]        
Reorganization Value   750,000    
Successor [Member] | New Equity and New Warrants [Member]        
Reorganization Value   725,900    
Successor [Member] | Other Liabilities Not Eliminated or Discharged Under the Restructuring Plan [Member]        
Reorganization Value   24,100    
Successor [Member] | Minimum [Member]        
Reorganization Value   600,000    
Successor [Member] | Maximum [Member]        
Reorganization Value   $ 900,000