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								12 Months Ended
	Jan. 01, 2017	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net income (loss)		$ 56,995	$ 10,484	$ (12,721)	$ (32,301)	$ (118,371)	$ (106,390)	$ (291,116)	$ (428,412)	$ 22,457	$ 22,457
Denominator:
Weighted average common shares outstanding - basic (in shares)										61,208
Potentially dilutive common shares (in shares)										248
Weighted average common shares outstanding - diluted (in shares)										61,460
Basic (in dollars per share)		$ 0.89	$ 0.17	$ (0.20)	$ (0.58)	$ (1)	$ (0.90)	$ (2.46)	$ (3.65)	$ 0.37
Diluted (in dollars per share)		$ 0.88	$ 0.17	$ (0.20)	$ (0.58)	$ (1)	$ (0.90)	$ (2.46)	$ (3.65)	$ 0.37
Employee Stock Option [Member]
Denominator:
Potentially dilutive common shares (in shares)
Restricted Stock [Member]
Denominator:
Potentially dilutive common shares (in shares)										4
Predecessor [Member]
Numerator:
Net income (loss)	$ 298,582											$ (944,289)	$ (872,542)
Denominator:
Weighted average common shares outstanding - basic (in shares)	118,633											118,305	102,853
Potentially dilutive common shares (in shares)
Weighted average common shares outstanding - diluted (in shares)	118,633											118,305	102,853
Basic (in dollars per share)	$ 2.52											$ (7.98)	$ (8.48)
Diluted (in dollars per share)	$ 2.52											$ (7.98)	$ (8.48)
Predecessor [Member] | Employee Stock Option [Member]
Denominator:
Potentially dilutive common shares (in shares)
Predecessor [Member] | Restricted Stock [Member]
Denominator:
Potentially dilutive common shares (in shares)