Note 13 - Acquisition of Aurizon Mines Ltd. (Details)	1 Months Ended	3 Months Ended		6 Months Ended		1 Months Ended				3 Months Ended
	Apr. 30, 2013 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2013 CAD	Jun. 30, 2013 USD ($)	Mar. 31, 2013	Mar. 31, 2013 In The Money Stock Options [Member]	Apr. 30, 2013 Asset Retirement Obligation [Member] USD ($)	Apr. 30, 2013 Plant and Equipment [Member] USD ($)	Apr. 30, 2013 Development and Other Mineral Interests [Member] USD ($)	Jun. 30, 2013 Aurizon Mines Ltd [Member] USD ($)	Jun. 30, 2013 Aurizon Mines Ltd [Member] CAD
Note 13 - Acquisition of Aurizon Mines Ltd. (Details) [Line Items]
Business Acquisition Per Share Consideration (in Dollars per share and Dollars per share)		$ 3.83		$ 3.83						$ 4.32	4.47
Business Acquisition, Share Price (in Dollars per share)											4.75
Business Acquisition Per Share Issued (in Shares)										0.9953	0.9953
Potentail Business Acquisition Per Share Price (in Dollars per share)											3.11
Business Acquisition Cost Sensitivity To Change In Share Price		$ 3.00
Potentail Business Acquitision Shares Issued (in Shares)		0.3442	0.3442	0.3442
Business Acquisition Shares Outstanding of Entity Acquired (in Shares)		164,838,377	164,838,377	164,838,377
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares)		56,997,790	56,997,790			747,132
Business Acquisition Shares Issued And Outstanding of Acquired Entity (in Shares)					165,585,509
Payments to Acquire Businesses, Gross (in Dollars)		496,400,000	514,500,000	496,211,000
Payments to Acquire Businesses, Gross		496,400,000	514,500,000	496,211,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable (in Dollars)		218,300,000	226,300,000	218,302,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		218,300,000	226,300,000	218,302,000
Business Combination, Consideration Transferred (in Dollars)			740,800,000	714,513,000
Exchange Rate		0.9645%	0.9645%
Share Price (in Dollars per share and Dollars per share)		$ 3.83	3.97	$ 3.83
Proceeds from Notes Payable	490,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	$ 715,400,000	$ 715,391,000		$ 715,391,000			$ 11.1	$ 127,800,000	$ 576,500,000