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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 ($) | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Foreign currency forward contracts | $ (2,181,368) | $ (1,115,805)
Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Foreign currency forward contracts | (329,523) | (169,129)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Foreign currency forward contracts | $ (1,851,845) | $ (946,676)

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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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