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Note 10 - Income Tax Benefit (Details Textual) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Operating Loss Carryforwards, Total | $ 26,400,000 | $ 9,000,000
Deferred Tax Assets, Valuation Allowance, Total | 6,642,866 | $ 5,967,884
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 674,982 |
Domestic Tax Authority [Member] |  |
Reduction of Operating Loss Carryforward, Tax Audit | $ 1,300,000 |
Open Tax Year | 2016 2017 2018 2019 |
State and Local Jurisdiction [Member] |  |
Open Tax Year | 2016 2017 2018 2019 |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + 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://fasb.org/us-gaap/role/ref/legacyRef -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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