Note 3 - Fresh Start Accounting (Details Textual) - USD ($) $ in Thousands	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
Fresh-Start Adjustment, Increase (Decrease), Stockholders' Equity		$ (353,956)
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