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Note 12 - Derivatives and Fair Value Disclosures - Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) | Dec. 31, 2017 | Dec. 31, 2016
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Derivatives | $ 518,644 | $ (101,188)
Fair Value, Inputs, Level 1 [Member] |  |
Derivatives |  |
Fair Value, Inputs, Level 2 [Member] |  |
Derivatives | 518,644 | (101,188)
Fair Value, Inputs, Level 3 [Member] |  |
Derivatives |  |
Interest Rate Swap 1 [Member] |  |
Derivatives | 645,169 | 263,635
Interest Rate Swap 1 [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Derivatives |  |
Interest Rate Swap 1 [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Derivatives | 645,169 | 263,635
Interest Rate Swap 1 [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Derivatives |  |
Interest Rate Swap 2 [Member] |  |
Derivatives | (126,525) | (364,823)
Interest Rate Swap 2 [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Derivatives |  |
Interest Rate Swap 2 [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Derivatives | (126,525) | (364,823)
Interest Rate Swap 2 [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Derivatives |  |

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- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 + Details
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