Note 10 - Income Taxes Income Tax Details (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) percentagepoint	Dec. 31, 2015 USD ($)
Income Tax Disclosure [Abstract]
Accrued Income Taxes, Current	$ 130,900
Income Taxes Receivable, Current	3,500
Operating Loss Carryforwards	653,800
Alternative minimum tax credit carryforward	7,367	$ 5,923
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	5,642
State net operating loss carryforward	51,875	46,914
Valuation Allowance, Amount	$ 46,892	$ 36,230
Percentage of Stock Ownership Needed to Be Included in Calculation of Change in Control Under Section 382 of Internal Revenue Code of 1986	5.00%
Number of Basis Point Increase in Ownership Over Three Year Period Needed By the Entity's Five Percent Shareholders | percentagepoint	50
Number of Years (Rolling) Used for Calculating Percentage Change in Ownership for Change in Control	3 years