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Note 16 - Earnings Attributable to Tennant Company Per Share (Tables) | 6 Months Ended
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Jun. 30, 2021
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Tennant Company |  | $ | 9.8 |  |  | $ | 14.3 |  |  | $ | 35.5 |  |  | $ | 19.5 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic - weighted average shares outstanding |  |  | 18,547,276 |  |  |  | 18,347,189 |  |  |  | 18,501,930 |  |  |  | 18,317,003 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation plans |  |  | 384,427 |  |  |  | 237,504 |  |  |  | 377,686 |  |  |  | 297,524 |
Diluted - weighted average shares outstanding |  |  | 18,931,703 |  |  |  | 18,584,693 |  |  |  | 18,879,616 |  |  |  | 18,614,527 |
Basic earnings per share attributable to Tennant Company |  | $ | 0.53 |  |  | $ | 0.78 |  |  | $ | 1.92 |  |  | $ | 1.06 |
Diluted earnings per share attributable to Tennant Company |  | $ | 0.51 |  |  | $ | 0.77 |  |  | $ | 1.88 |  |  | $ | 1.05 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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