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Note 8 - Derivative Instruments and Hedging Activities (Details) - Movement in AOCI Balance - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in AOCI Balance [Abstract]
Opening AOCI balance	$ (946,676)	$ (372,593)
Opening AOCI balance	324,235	127,612
Opening AOCI balance	(622,441)	(244,981)
Other comprehensive income (loss)before reclassifications	(3,171,740)	(1,527,171)
Other comprehensive income (loss)before reclassifications	1,140,275	523,056
Other comprehensive income (loss)before reclassifications	(2,031,465)	(1,004,115)	$ (470,779)
Amount reclassified from accumulated other comprehensive income	2,396,733	953,088
Amount reclassified from accumulated other comprehensive income	(852,279)	(326,433)
Amount reclassified from accumulated other comprehensive income	1,544,454	626,655	181,694
Other comprehensive income (loss)	(775,007)	(574,083)
Other comprehensive income (loss)	287,996	196,623
Other comprehensive income (loss)	(487,011)	(377,460)
Ending AOCI balance	(1,721,683)	(946,676)	(372,593)
Ending AOCI balance	612,231	324,235	127,612
Ending AOCI balance	$ (1,109,452)	$ (622,441)	$ (244,981)

X

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, tax expense (benefit). Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount before tax of increase (decrease) in accumulated equity from transactions and other events and circumstances from non-owner sources, including portion attributable to noncontrolling interest. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners).

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