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Note 11 - Stock Incentive Plan (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Nonvested Share Activity [Table Text Block] |
Non-vested Shares |  |  | Shares |  |  |  | Weighted-Average Grant-Date Fair Value |
Non-vested on January 1, 2019 |  |  | 21,948 |  |  |  | 10.16 |
Granted |  |  | 15,444 |  |  |  | 5.84 |
Vested |  |  | (14,108 | ) |  |  | 11.01 |
Non-vested on December 31, 2019 |  |  | 23,284 |  |  |  | 6.77 |

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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