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Note 8 - Investments, Including Investments Accounted for Using the Equity Method (Details Textual) - USD ($) |  |  |  | 1 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 01, 2018 | May 31, 2018 | Dec. 31, 2017 | Jan. 31, 2018 | Sep. 30, 2018 | Dec. 31, 2017 | Apr. 27, 2018 | Sep. 13, 2016
Financing Receivable, Gross |  |  |  |  |  |  | $ 2,116,972 |
Note Receivable, Stated Interest Rate |  |  |  |  |  |  | 15.00% |
Proceeds from Interest Received | $ 29,990 |  |  |  |  |  |  |
Unconsolidated Affiliates [Member] | Board of Directors [Member] |  |  |  |  |  |  |  |
Equity Method Investments |  |  |  |  | $ 418,801 |  |  |
Unconsolidated Affiliates [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  | 7.15% |  |  |
Unconsolidated Affiliates [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  | 30.00% |  |  |
Breezeway Homes Inc. [Member] |  |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Per-Dollar-Amount |  |  |  | $ 0.2665 |  |  |  |
Preferred Stock [Member] | Breezeway Homes Inc. [Member] |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued |  |  |  | 31,227 |  |  |  |
Limited Liability Company [Member] |  |  |  |  |  |  |  |
Cost Method Investment, Ownership Percentage |  |  | 5.00% |  |  | 5.00% |  |
Cost-method Investments, Other than Temporary Impairment |  |  |  |  | $ 0 | $ 0 |  |
Breezeway Homes Inc. [Member] |  |  |  |  |  |  |  |
Financing Receivable, Net, Total |  |  |  |  |  |  |  | $ 100,000
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 3.00%
Financing Receivable, Gross |  |  | $ 103,896 | $ 104,019 |  | $ 103,896 |  |
US Treasury Notes Securities [Member] |  |  |  |  |  |  |  |
Gain on Sale of Investments |  |  |  |  | $ 10,345 |  |  |
Voting Common Stock of Privately Held Company CB&T Holding Corporation [Member] |  |  |  |  |  |  |  |
Payments to Acquire Long-term Investments |  | $ 19,058,485 |  |  |  |  |  |
Cost Method Investment, Ownership Percentage |  | 14.99% |  |  |  |  |  |
Non-voting Common Units of LLC [Member] |  |  |  |  |  |  |  |
Payments to Acquire Long-term Investments |  |  | $ 10,000,000 |  |  |  |  |

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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References No definition available. + Details
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- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(a)) -URI http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(9)(a)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(7)(c)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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