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Note 6 - Derivatives and Hedging Activities (Details) - Summary of Interest Rate Cap Derivatives - Cash Flow Hedging [Member] - USD ($) | Dec. 31, 2015 | Dec. 31, 2014
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Interest Rate Cap 1 [Member] | Other Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | $ 15,000,000 |
Fair value | 321,112 | $ 608,189
Interest Rate Cap 2 [Member] | Other Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | 15,000,000 |
Fair value | 534,912 | 879,198
Interest Rate Cap [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional amount | 30,000,000 |
Fair value | $ 856,024 | $ 1,487,387

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value as of the balance sheet date of all interest rate derivative assets designated as cash flow hedging instruments. + References 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=56946850&loc=SL5624163-113959 + Details
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