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Note 13 - Stock Based Compensation - Restricted Stock Activity (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Non-vested, shares (in shares) | 36,828 | 30,205
Non-vested, weighted average grant date fair value (in dollars per share) | $ 40.11 | $ 35.63
Granted, shares (in shares) | 21,255 | 13,243
Granted, weighted average grant date fair value (in dollars per share) | $ 41.42 | $ 44.30
Vested, shares (in shares) | (13,493) | (6,400)
Vested, weighted average grant date fair value (in dollars per share) | $ 34.84 | $ 27.50
Forfeited, shares (in shares) | (355) | (220)
Forfeited, weighted average grant date fair value (in dollars per share) | $ 41.50 | $ 43.65
Non-vested, shares (in shares) | 44,235 | 36,828
Non-vested, weighted average grant date fair value (in dollars per share) | $ 42.33 | $ 40.11

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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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