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Note 10 - Derivative Financial Instruments - Foreign Currency Exchange Contracts (Details) - USD ($)	Sep. 30, 2016	Jun. 30, 2016
Euro Member Countries, Euro
Derivative, Notional Amount	$ 1,040,670	$ 2,476,683
United Kingdom, Pounds
Derivative, Notional Amount	$ 744,194	$ 593,799

X

- 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

X

- Details

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

X

- Details

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