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Note 6 - Derivative Instruments and Hedging Activities (Details) - Fair Value of Derivative Instruments in the Consolidated Balance Sheets - Derivative Instruments [Member] - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Foreign currency forward contracts	$ (1,523,647)	$ (1,115,805)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Foreign currency forward contracts	(230,472)	(169,129)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Foreign currency forward contracts	$ (1,293,175)	$ (946,676)

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

+ References

No definition available.

+ Details

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- Details

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