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Note 3 - Income Taxes (Details Textual) - USD ($) $ in Millions | Sep. 30, 2016 | Jun. 30, 2016 | Dec. 31, 2015
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Internal Revenue Service (IRS) [Member] | Domestic Tax Authority [Member] |  |  |
Deferred Tax Assets, Net | $ 24.8 |  |
Canada Revenue Agency [Member] | Foreign Tax Authority [Member] |  |  |
Deferred Tax Liabilities, Net | 125.6 |  |
Mexican Tax Authority [Member] | Foreign Tax Authority [Member] |  |  |
Deferred Tax Assets, Net | 2.9 |  |
Deferred Tax Assets, Valuation Allowance |  | $ 1.3 |
Deferred Tax Liabilities, Net | 97.9 |  |
Deferred Tax Assets, Valuation Allowance | $ 107.0 |  | $ 116.0

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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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