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Note 15 - Income Tax - Gross Operating Loss Carryforwards (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Domestic Tax Authority [Member] | Canada Revenue Agency [Member] |  |
Gross net operating loss carry forward | $ 30,904 | $ 37,428
Gross net operating loss not recognized | 24 | 153
Net operating loss carry foward | 30,880 | 37,275
Domestic Tax Authority [Member] | Canada Revenue Agency [Member] | Capital Loss Carryforward [Member] |  |
Gross capital loss carry forward | 1,881 | 183
Gross capital loss not recognized | 1,567 | 108
Net capital loss carry forward | 314 | 75
Foreign Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |
Gross net operating loss carry forward | 47,720 | 85,550
Gross net operating loss not recognized | 915 | 4,100
Net operating loss carry foward | 46,805 | 81,450
Foreign Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Capital Loss Carryforward [Member] |  |
Gross capital loss carry forward | 1,671 | 54
Gross capital loss not recognized | 1,671 |
Net capital loss carry forward |  | 54
Foreign Tax Authority [Member] | Other Foreign Tax Authorities [Member] |  |
Gross net operating loss carry forward | 50,512 | 45,988
Gross net operating loss not recognized | 30,705 | 31,543
Net operating loss carry foward | 19,807 | 14,445
Foreign Tax Authority [Member] | Other Foreign Tax Authorities [Member] | Capital Loss Carryforward [Member] |  |
Gross capital loss carry forward | 7,139 | 6,521
Gross capital loss not recognized | 7,139 | 6,521
Net capital loss carry forward |  |

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- Definition The gross amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References No definition available. + Details
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- Definition The unrecognized amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References No definition available. + Details
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- Definition The gross amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References No definition available. + Details
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- Definition The unrecognized amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References No definition available. + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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