Note 2 - Investments and Restricted Cash (Details) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Note 2 - Investments and Restricted Cash (Details) [Line Items]
Long-term Investments	$ 8,766,000	$ 9,614,000
Tax Basis of Investments, Cost for Income Tax Purposes	12,700,000	8,100,000
Payments to Acquire Investments	5,738,000
Cost Method Investments	1,600,000
Proceeds from Sale of Long-term Investments	1,800,000
Equity Method Investment, Ownership Percentage	29.40%
Equity Method Investments	800,000
Restricted Investments	5,300,000	900,000
Non-Current Investments Held Having Net Gain Position [Member]
Note 2 - Investments and Restricted Cash (Details) [Line Items]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	3,900,000
Non-Current Investments Held Having Net Loss Position [Member]
Note 2 - Investments and Restricted Cash (Details) [Line Items]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	53,000,000
Aurizon Mines Ltd [Member]
Note 2 - Investments and Restricted Cash (Details) [Line Items]
Payments to Acquire Investments	$ 300,000