Note 5 - Derivative Instruments and Fair Value Measurements (Details) - Effect of Derivative Instruments on Statement of Operations (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivatives designated as hedging instruments
Interest rate swaps	$ (776,172)	$ (1,861,660)	$ (1,627,154)	$ (3,725,606)
Not Designated as Hedging Instrument [Member]
Derivatives not designated as hedging instruments
FFAs, bunker swaps, freight and bunker derivatives		$ 7,076		$ 1,028,375