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Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 shares | Sep. 30, 2017 shares | Sep. 30, 2018 USD ($) | Sep. 30, 2018 shares | Sep. 30, 2017 shares
Number of Reportable Segments |  |  |  | 2 |
Weighted Average Number of Shares Outstanding, Basic, Total | 4,730,624 | 4,688,284 |  | 4,722,189 | 4,680,846
Weighted Average Number Diluted Shares Outstanding Adjustment, Total | 0 | 0 |  | 0 | 0
Accounting Standards Update 2018-02 [Member] |  |  |  |  |
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect | $ |  |  | $ 173 |  |

X
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- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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