Note 5 - Fair Value of Derivative Instruments in the Consolidated Balance Sheets (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Derivative Instruments [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Fair value	$ (354,459)	$ (1,721,683)
Derivative Instruments [Member] | Not Designated as Hedging Instrument [Member]
Fair value	(62,362)	(305,403)
Derivative Instruments [Member]
Fair value	(416,821)	$ (2,027,086)
Fair value	$ (416,821)