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Note 7 - Income Taxes - Net Operating Loss Carryforwards (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Operating Loss Carryforwards | $ 4,116 | $ 5,285
Operating Loss Carryforward Expiring in 2021 [Member] |  |
Operating Loss Carryforwards | 689 | 689
Operating Loss Carryforward Expiring in 2022 [Member] |  |
Operating Loss Carryforwards | 849 | 849
Operating Loss Carryforward Expiring in 2030 [Member] |  |
Operating Loss Carryforwards |  | 4
Operating Loss Carryforward Expiring in 2031 [Member] |  |
Operating Loss Carryforwards |  | 298
Operating Loss Carryforward Expiring Thereafter [Member] |  |
Operating Loss Carryforwards | $ 2,578 | $ 3,445

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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=65882285&loc=d3e32559-109319 + Details
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