Note 2 - Bankruptcy and Related Matters - Debtor-in-Possession Unaudited Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Cash and cash equivalents	$ 14,117	$ 8,822	$ 10,647	$ 21,939
Prepaid expenses	6,290	3,799
Total current assets	62,155	52,889
Total assets	1,071,493	1,053,903
Debtor in possession financing	17,000
Accounts payable	8,729	11,666
Accrued personnel costs	9,514	9,109
Other accrued liabilities	4,882	9,305
Total current liabilities	161,824	525,247
Deferred income tax liabilities	124,581	58,094
Liabilities subject to compromise	448,124
Stockholders' equity	315,966	449,621
Total liabilities and stockholders' equity	1,071,493	1,053,903
Parent Company [Member]
Cash and cash equivalents	4,007	$ 2
Prepaid expenses	1,641
Total current assets	5,648
Intercompany notes and other receivables	418,665
Investments in subsidiaries	286,164
Total assets	710,477
Debtor in possession financing	10,000
Accounts payable	369
Accrued personnel costs	5,004
Other accrued liabilities	588
Total current liabilities	15,961
Deferred income tax liabilities	111,330
Liabilities subject to compromise	448,124
Stockholders' equity	135,062
Total liabilities and stockholders' equity	$ 710,477