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Note 5 - Income Taxes (Details) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Note 5 - Income Taxes (Details) [Line Items]        
Deferred Tax Assets, Valuation Allowance $ 115,806,000 $ 32,094,000 $ 27,155,000 $ 23,030,000
Deferred Tax Liabilities, Net 65,729,000 42,400,000    
Foreign Earnings Repatriated $ 0 0 $ 0  
Operating Loss Carryforwards Expiration Period 20 years      
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax $ 11,607,000 14,698,000    
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation 20,000,000      
Unrecognized Tax Benefits 0 $ 0    
Domestic Tax Authority [Member]        
Note 5 - Income Taxes (Details) [Line Items]        
Operating Loss Carryforwards 241,000,000      
State and Local Jurisdiction [Member]        
Note 5 - Income Taxes (Details) [Line Items]        
Operating Loss Carryforwards 95,000,000      
Foreign Tax Authority [Member]        
Note 5 - Income Taxes (Details) [Line Items]        
Operating Loss Carryforwards 71,000,000      
Provincial [Member]        
Note 5 - Income Taxes (Details) [Line Items]        
Operating Loss Carryforwards $ 5,000,000