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Note 3 - Income Taxes (Details Textual) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2017 | Jun. 30, 2017 | Dec. 31, 2016
Deferred Tax Liabilities, Net |  | $ 76.6 |
Deferred Tax Assets, Valuation Allowance |  | 83.0 | $ 100.0
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |  |
Deferred Tax Assets, Net |  | 44.6 |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $ (15.0) |  |
Foreign Tax Authority [Member] | Canada Revenue Agency [Member] |  |  |
Deferred Tax Liabilities, Net |  | $ 121.2 |

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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=84230637&loc=d3e32537-109319 + Details
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