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Note 12 - Income Taxes and Deferred Tax Asset/Liability (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Operating Loss Carryforwards $ 169,045    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 35.00% 35.00% 35.00%
Deferred Tax Assets, Valuation Allowance $ 58,000    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 0 $ 0  
Will be Recognized as Reduction of Income Tax Expense [Member]      
Unrecognized Tax Benefits 48,300    
Will be Recorded as Increase in Equity [Member]      
Unrecognized Tax Benefits 9,700    
Domestic Tax Authority [Member]      
Operating Loss Carryforwards $ 112,900    
Operating Loss Carryforward Expiration Period 20 years    
Domestic Tax Authority [Member] | Earliest Tax Year [Member]      
Open Tax Year 2013    
State and Local Jurisdiction [Member]      
Operating Loss Carryforwards $ 56,100    
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]      
Open Tax Year 2012    
State and Local Jurisdiction [Member] | Minimum [Member]      
Operating Loss Carryforward Expiration Period 5 years    
State and Local Jurisdiction [Member] | Maximum [Member]      
Operating Loss Carryforward Expiration Period 20 years