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Note 9 - Equity Compensation - Weighted Average Assumptions Were Used for the Warrants (Details) | Feb. 21, 2017
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Measurement Input, Expected Dividend Rate [Member] |
Measurement input | 0.0201
Measurement Input, Price Volatility [Member] |
Measurement input | 0.39
Measurement Input, Risk Free Interest Rate [Member] |
Measurement input | 0.018
Measurement Input, Expected Term [Member] |
Measurement input | 4.5

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- Definition Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputRiskFreeInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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