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Note 2 - Cash, Investments, and Restricted Cash (Details)
 1 Months Ended 12 Months Ended
Jun. 30, 2014
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2015
CAD
Dec. 31, 2012
USD ($)
Note 2 - Cash, Investments, and Restricted Cash (Details) [Line Items]            
Cash, FDIC Insured Amount   $ 250,000        
Cash CDIC Insured Amount (in Dollars) | CAD         CAD 100,000  
Long-term Investments   1,515,000 $ 4,920,000      
Available-for-sale Securities, Amortized Cost Basis   4,000,000 7,300,000      
Other than Temporary Impairment Losses, Investments   2,500,000 2,400,000      
Payments to Acquire Investments   947,000 580,000 $ 6,001,000    
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax   (1,159,000) (1,409,000) $ (2,552,000)   $ 2,059,000
Restricted Investments   1,000,000 $ 900,000      
Adjustment to Restricted Cash $ (7,500,000)          
Typhoon Exploration Inc. [Member]            
Note 2 - Cash, Investments, and Restricted Cash (Details) [Line Items]            
Equity Method Investments   1,000,000        
Brixton Metals Corporation [Member]            
Note 2 - Cash, Investments, and Restricted Cash (Details) [Line Items]            
Investment Owned, at Fair Value   300,000        
Non-Current Investments Held Having Net Loss Position [Member]            
Note 2 - Cash, Investments, and Restricted Cash (Details) [Line Items]            
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax   (2,600,000)        
Non-Current Investments Held Having Net Gain Position [Member]            
Note 2 - Cash, Investments, and Restricted Cash (Details) [Line Items]            
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax   $ 5,000