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Note 19 - Income Attributable to Tennant Company Per Share (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Tennant Company |  | $ | 64.9 |  |  | $ | 33.7 |  |  | $ | 45.8 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Basic - weighted average shares outstanding |  |  | 18,499,674 |  |  |  | 18,349,724 |  |  |  | 18,118,486 |
Effect of dilutive securities |  |  | 349,543 |  |  |  | 285,278 |  |  |  | 334,659 |
Diluted - weighted average shares outstanding |  |  | 18,849,217 |  |  |  | 18,635,002 |  |  |  | 18,453,145 |
Basic earnings per share attributable to Tennant Company |  | $ | 3.51 |  |  | $ | 1.84 |  |  | $ | 2.53 |
Diluted earnings per share attributable to Tennant Company |  | $ | 3.44 |  |  | $ | 1.81 |  |  | $ | 2.48 |

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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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