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Note 13 - Acquisition of Aurizon Mines Ltd. (Details) - Unaudited Proforma Financial Information (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Unaudited Proforma Financial Information [Abstract] |  |  |  |
Sales of products | $ 118,584 | $ 127,284 | $ 237,946 | $ 275,060
Net income (loss) | (13,168) | 2,844 | (3,388) | 14,450
Income (loss) applicable to common shareholders | $ (13,306) | $ 2,706 | $ (3,664) | $ 14,174
Basic and diluted income (loss) per common share (in Dollars per share) | $ (0.04) | $ 0.01 | $ (0.01) | $ 0.04

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