Note 1 - Organization, Nature of Business and Summary of Significant Accounting Policies - Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 01, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Weighted average common shares outstanding and assumed conversions (in shares)		62,232		58,913
Basic (in dollars per share)		$ (0.20)		$ (0.76)
Diluted (in dollars per share)		$ (0.20)		$ (0.76)
Net income (loss)		$ (12,721)	$ (291,116)	$ (45,022)	$ (719,529)
Weighted average common shares outstanding (in shares)		62,232		58,913
Employee Stock Option [Member]
Potentially dilutive common shares (in shares)
Restricted Stock [Member]
Weighted average common shares outstanding (in shares)
Predecessor [Member]
Weighted average common shares outstanding and assumed conversions (in shares)	118,633		118,426		117,979
Basic (in dollars per share)	$ 2.52		$ (2.46)		$ (6.10)
Diluted (in dollars per share)	$ 2.52		$ (2.46)		$ (6.10)
Net income (loss)	$ 298,582		$ (291,116)		$ (719,529)	$ (944,289)
Weighted average common shares outstanding (in shares)	118,633		118,426		117,979
Predecessor [Member] | Employee Stock Option [Member]
Potentially dilutive common shares (in shares)
Predecessor [Member] | Restricted Stock [Member]
Weighted average common shares outstanding (in shares)