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Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2019 USD ($) shares | Jun. 30, 2018 shares | Jun. 30, 2019 USD ($) shares | Jun. 30, 2018 shares | Jan. 01, 2019 USD ($) | Dec. 31, 2018 USD ($)
Number of Reportable Segments |  |  | 2 |  |  |
Weighted Average Number of Shares Outstanding, Basic, Total | shares | 4,763,858 | 4,724,124 | 4,756,209 | 4,717,901 |  |
Weighted Average Number Diluted Shares Outstanding Adjustment, Total | shares | 0 | 0 | 0 | 0 |  |
Weighted Average Number of Shares, Contingently Issuable | shares | 0 | 0 | 0 | 0 |  |
Finance Lease, Liability, Total | $ 0 |  | $ 0 |  |  |
Operating Lease, Right-of-Use Asset | 1,190 |  | 1,190 |  |  |
Operating Lease, Liability, Total | $ 1,190 |  | $ 1,190 |  |  |
Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |
Operating Lease, Right-of-Use Asset |  |  |  |  | $ 1,280 |
Operating Lease, Liability, Total |  |  |  |  | $ 1,280 |

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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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- Definition Shares issuable for little or no cash consideration upon the satisfaction of certain conditions (contingently issuable shares) are considered outstanding common shares and included in the computation of basic Earnings Per Share as of the date that all necessary conditions have been satisfied (in essence, when issuance of the shares is no longer contingent). Outstanding common shares that are contingently returnable (that is, subject to recall) are treated in the same manner as contingently issuable shares. Contingently issuable shares include shares that (a) will be issued in the future upon the satisfaction of specified conditions, (b) have been placed in escrow and all or part must be returned if specified conditions are not met, or (c) have been issued but the holder must return all or part if specified conditions are not met. The number of contingently issuable shares is determined by relating the portion of time within a reporting period that these shares have been outstanding to the total time in that period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=117326831&loc=d3e2646-109256 + Details
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