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Note 13 - Acquisitions (Details Textual) CAD / shares in Units, $ / shares in Units, $ in Thousands, CAD in Millions |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Sep. 13, 2016 USD ($) $ / shares shares | Jun. 27, 2016 CAD CAD / shares shares | Sep. 30, 2016 USD ($) shares | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($)
Mines Management [Member] | Land [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | $ 800 |  |  |  |  |  |
Mines Management [Member] | Plant and Equipment [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | 100 |  |  |  |  |  |
Mines Management [Member] | Mineral Interests [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | 67,600 |  |  |  |  |  |
Mines Management [Member] | Acquisition Costs [Member] |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  | $ 1,000 |  |  |  |
Mines Management [Member] |  |  |  |  |  |  |
Business Combination, Consideration Transferred | 52,134 |  |  |  |  |  |
Payments to Acquire Businesses, Gross | 4,025 |  |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | $ 48,109 |  |  |  |  |  |
Business Acquistion, Number of Common Stock Shares Exchanged for Each Share of Acquiree Common Stock | shares | 0.2218 |  |  |  |  |  |
Business Acquisition, Common Shares Outstanding of Acquiree | shares | 36,498,625 |  |  |  |  |  |
Business Acquisition, Outstanding Options to Purchase Common Shares of Acquiree | shares | 963,079 |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares | 8,309,006 |  | 8,309,006 |  |  |  |
Business Acquisition, Share Price | $ / shares | $ 5.79 |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | $ 68,476 |  |  |  |  |  |
Business Combination, Acquisition Related Costs, Shares Issued | shares |  |  | 181,048 |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  | $ 3,800 |  | $ 4,200 |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  |  |  |  |  | $ 32 |
Dolly Varden [Member] |  |  |  |  |  |  |
Business Combination, Consideration Transferred | CAD |  | CAD 13.6 |  |  |  |  |
Business Acquisition, Share Price | CAD / shares |  | CAD 0.69 |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Shares | shares |  | 2,620,291 |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Warrants | shares |  | 1,250,000 |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage |  | 19.80% |  |  |  |  |
Mines Management [Member] | Montanore Project [Member] |  |  |  |  |  |  |
Ownership Percentage |  |  | 100.00% | 100.00% |  | 100.00% |
Dolly Varden [Member] | Dolly Varden Historic Silver Property [Member] |  |  |  |  |  |  |
Ownership Percentage |  | 100.00% |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  | $ 1,765 | $ 15 | $ 2,167 | $ 2,162

X
- Definition The number of common shares outstanding of the acquiree used to estimate consideration in a business acquisition. + References No definition available. + Details
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- Definition The number of outstanding options to purchase common shares of the acquiree used to estimate consideration in a business acquisition. + References No definition available. + Details
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- Definition In a business acquisition, the number of the company's shares of common stock exchanged for each share of the acquiree's common stock. + References No definition available. + Details
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- Definition Number of shares issued during the period for payment of acquisition related costs. + References No definition available. + Details
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- Definition Number of acquiree's shares held by the acquirer immediately before the acquisition date in a business combination. + References No definition available. + Details
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- Definition Number of acquiree's shares into which warrants held by the acquirer may be converted immediately before the acquisition date. + References No definition available. + Details
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- Definition Percentage of ownership in properties. + References No definition available. + Details
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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination. + References No definition available. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e1043-128460 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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- Definition This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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- Definition The amount of property, plant, and equipment recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=73531372&loc=d3e2207-128464 + Details
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- Definition Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination. + References No definition available. + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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