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Note 13 - Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Shares Under Option |  |  | Weighted- Average Exercise Price |
Outstanding—January 1, 2017: |  |  | 56,131 |  |  | $ | 10.85 |
Granted |  |  | - |  |  |  | - |
Exercised |  |  | (11,063 | ) |  |  | 11.13 |
Canceled |  |  | - |  |  |  | - |
Outstanding—December 31, 2017: |  |  | 45,068 |  |  | $ | 10.79 |
Granted |  |  | - |  |  |  | - |
Exercised |  |  | (45,005 | ) |  |  | 10.79 |
Canceled |  |  | (63 | ) |  |  | 11.22 |
Outstanding—December 31, 2018: |  |  | - |  |  | $ | - |
Granted |  |  | - |  |  |  | - |
Exercised |  |  | - |  |  |  | - |
Canceled |  |  | - |  |  |  | - |
Outstanding—December 31, 2019: |  |  | - |  |  | $ | - |
Options exercisable—December 31, 2019: |  |  | - |  |  | $ | - |
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] |
|  | Restricted Stock |
|  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value |
Nonvested at January 1, 2019 |  |  | 100,917 |  |  | $ | 23.09 |
Granted |  |  | 2,058 |  |  |  | 48.75 |
Canceled/forfeited/expired |  |  | (3,500 | ) |  |  | 36.35 |
Vested |  |  | (44,016 | ) |  |  | 21.65 |
Nonvested at December 31, 2019 |  |  | 55,459 |  |  | $ | 24.35 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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