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Note 3 - Income Taxes | 3 Months Ended
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Mar. 31, 2018
Notes to Financial Statements |
Income Tax Disclosure [Text Block] | Note 3. Income Taxes Major components of our income tax provision for the three months ended March 31, 2018 and 2017 are as follows (in thousands):
|  | Three Months Ended |
|  | March 31, |
|  | 2018 |  |  | 2017 |
Current: |  |  |  |  |  |  |  |
Domestic |  | $ | — |  |  | $ | (12,797 | )
Foreign |  |  | 1,206 |  |  |  | 5,515 |
Total current income tax provision (benefit) |  |  | 1,206 |  |  |  | (7,282 | )
Deferred: |  |  |  |  |  |  |  |
Domestic |  |  | — |  |  |  | (18,903 | )
Foreign |  |  | (438 | ) |  |  | (2,886 | )
Total deferred income tax (benefit) provision |  |  | (438 | ) |  |  | (21,789 | )
Total income tax provision (benefit) |  | $ | 768 |  |  | $ | (29,071 | )
The current income tax provisions for the three months ended March 31, 2018 and 2017 vary from the amounts that would have resulted from applying the statutory income tax rate to pre-tax income due primarily to the non-utilization of tax losses in the U.S. in 2018, the impact of the change in accounting method treatment of the #4 Shaft development costs in 2017, and the impact of taxation in foreign jurisdictions. As of March 31, 2018, we have a net deferred tax liability in the U.S. of $0.3 million, a net deferred tax liability in Canada of $116.9 million, and a net deferred tax asset in Mexico of $1.0 million, for a consolidated worldwide net deferred tax liability of $116.2 million. We recorded a full valuation allowance in the U.S. in December 2017 as a result of U.S. tax reform. Our circumstances at March 31, 2018 continue to support a full valuation allowance in the U.S. where our domestic tax provision is zero. In the first quarter of 2017, we received consent from the Internal Revenue Service to permit us to take a different income tax position relating to the timing of deductions for the #4 Shaft development costs at Lucky Friday. This tax accounting method change substantially revised the timing of deductions for these costs for regular tax and Alternative Minimum Tax ("AMT") relative to our projected life of mine and projected taxable income. These timing changes caused us to revise our assessment of the ability to generate sufficient future taxable income to realize our deferred tax assets, resulting in a valuation allowance release of approximately $15 million. At March 31, 2018 and December 31, 2017, the balances of the valuation allowances on our deferred tax assets were approximately $80.4 million and $78.7 million, respectively.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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