Note 5 - Derivative Instruments and Fair Value Measurements (Details) - Effect of Designated Derivative Instruments on the Balance Sheets (USD $)	Jun. 30, 2013	Dec. 31, 2012
Note 5 - Derivative Instruments and Fair Value Measurements (Details) - Effect of Designated Derivative Instruments on the Balance Sheets [Line Items]
Derivatives designated for cash flow hedging relationships	$ (657,346)	$ (2,243,833)
Designated as Hedging Instrument [Member]
Note 5 - Derivative Instruments and Fair Value Measurements (Details) - Effect of Designated Derivative Instruments on the Balance Sheets [Line Items]
Derivatives designated for cash flow hedging relationships	$ (657,346)	$ (2,243,833)

Fair value of all liability derivatives designated as cash flow hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

Name:	us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant