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Note 12 - Equity Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | For the years ended December 31, |
(in thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |
RSU expense before taxes of the Plan |  | $ | 1,265 |  |  | $ | 965 |  |  | $ | 643 |
RSU expense after taxes |  |  | 1,024 |  |  |  | 704 |  |  |  | 471 |
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | Number of Shares |  |  | Weighted Average Estimated Fair Value |  |  | Number of Shares |  |  | Weighted Average Estimated Fair Value |  |  | Number of Shares |  |  | Weighted Average Estimated Fair Value |
Beginning balance |  |  | 636,086 |  |  | $ | 19.25 |  |  |  | 527,546 |  |  | $ | 20.65 |  |  |  | 469,069 |  |  | $ | 20.11 |
Granted |  |  | 70,588 |  |  |  | 11.92 |  |  |  | 207,521 |  |  |  | 16.36 |  |  |  | 84,283 |  |  |  | 22.33 |
Converted into shares |  |  | (94,161 | ) |  |  | 20.27 |  |  |  | (96,845 | ) |  |  | 20.59 |  |  |  | (19,097 | ) |  |  | 16.09 |
Forfeited |  |  | (1,973 | ) |  |  | 18.14 |  |  |  | (2,136 | ) |  |  | 22.80 |  |  |  | (6,709 | ) |  |  | 16.98 |
Outstanding at December 31 |  |  | 610,540 |  |  | $ | 18.25 |  |  |  | 636,086 |  |  | $ | 19.25 |  |  |  | 527,546 |  |  | $ | 20.65 |
Vested at December 31 |  |  | 375,692 |  |  | $ | 18.88 |  |  |  | 419,721 |  |  | $ | 20.37 |  |  |  | 436,069 |  |  | $ | 20.42 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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