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Note 16 - Acquisitions (Details) | 1 Months Ended | 7 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  | 7 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2013 USD ($) | Feb. 21, 2008 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2013 CAD | Sep. 30, 2013 USD ($) | Dec. 31, 2011 | Feb. 14, 2014 USD ($) | May 31, 2013 USD ($) | May 31, 2013 CAD | 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 ($) | Dec. 31, 2013 In The Money Stock Options [Member] | Dec. 31, 2013 Aurizon Mines Ltd [Member] | Dec. 31, 2013 Aurizon Mines Ltd [Member] CAD | May 31, 2013 Aurizon Mines Ltd [Member] USD ($) | May 31, 2013 Aurizon Mines Ltd [Member] CAD
Note 16 - Acquisitions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Per Share Consideration (in Dollars per share) |  |  |  |  | $ 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 (in Dollars per share) |  |  | $ 3.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Potentail Business Acquitision Shares Issued (in Shares) |  |  | 0.3442 | 0.3442 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Shares Outstanding of Entity Acquired (in Shares) |  |  | 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 | 165,585,509 |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross (in Dollars) |  |  | $ 496,200,000 | 514,500,000 | $ 496,211,000 |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  | 496,200,000 | 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) |  |  | $ 3.08 |  |  |  | $ 3.47 | $ 3.83 | 3.97 |  |  |  |  |  |  |  |
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 |  |  |  |  | 11,100,000 | 127,800,000 | 576,500,000 |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  | 30.00% |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Acquisitions (in Shares) |  | 5,395,683 |  |  | 56,997,790 |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions |  | $ 33,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage Common Shares Based on Volume Weighted Average Price |  |  |  |  |  | 90.00% |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Number of Trading Days |  |  |  |  |  | 20 days |  |  |  |  |  |  |  |  |  |  |

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