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Note 10 - Derivative Financial Instruments - Foreign Currency Exchange Contracts (Details) - USD ($) | Dec. 31, 2016 | Jun. 30, 2016
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Euro Member Countries, Euro |  |
Derivative, Notional Amount | $ 199,904 | $ 2,476,683
United Kingdom, Pounds |  |
Derivative, Notional Amount | $ 247,852 | $ 593,799

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_CurrencyAxis=currency_EUR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_CurrencyAxis=currency_GBP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |