Note 2 - Bankruptcy and Related Matters - Debtor-in-Possession Unaudited Condensed Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue	$ 24,641	$ 30,487	$ 49,000	$ 69,281
General and administrative expenses	8,804	8,854	18,381	18,642
Pre-petition restructuring charges	11,933		17,787
Total costs and expenses	55,321	96,825	111,672	263,875
Operating loss	(30,680)	(66,338)	(62,672)	(194,594)
Interest expense	(5,716)	(8,991)	(24,152)	(17,388)
Interest income	9	35	16	75
Reorganization items	(5,094)		(5,094)
Foreign currency transaction loss and other	(204)	(1,083)	(391)	(1,127)
Total other income (expense)	(11,005)	15,753	(29,621)	17,472
Loss before income taxes	(41,685)	(50,585)	(92,293)	(177,122)
Income tax expense	1,138	3,005	(73,069)	38,360
Net loss	(40,547)	$ (47,580)	(165,362)	$ (138,762)
Parent Company [Member]
Revenue
General and administrative expenses	1,486		3,389
Pre-petition restructuring charges	11,716		17,569
Total costs and expenses	13,202		20,958
Operating loss	(13,202)		(20,958)
Interest expense	(3,910)		(17,219)
Interest income	2,507		5,183
Reorganization items	(1,902)		(1,902)
Foreign currency transaction loss and other	(8)		(9)
Total other income (expense)	(3,313)		(13,947)
Loss before income taxes	(16,515)		(34,905)
Income tax expense	(6,319)		(84,091)
Net loss	$ (22,834)		$ (118,996)