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Note 18 - Earnings Per Share ("EPS") - Basic and Diluted Earnings Per Share (Details) - shares | 3 Months Ended | 12 Months Ended
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Dec. 31, 2020 | [1] | Sep. 30, 2020 | [2] | Jun. 30, 2020 | [3] | Mar. 31, 2020 | [4] | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Basic (in shares) |  |  |  |  |  |  |  |  | 14,222,163 | 14,120,584 | 14,441,536
Stock options, SARs, RSAs and RSUs (in shares) |  |  |  |  |  |  |  |  | 0 | 253,199 | 247,505
Diluted shares used in the calculation of earnings per share (in shares) | 14,275,000 | 14,205,000 | 14,199,000 | 14,353,000 | 14,621,000 | 14,387,000 | 14,088,000 | 14,314,000 | 14,222,163 | 14,373,783 | 14,689,041
[1] | In the quarter ended December 31, 2020, we recorded a pre-tax goodwill impairment charge of $24.4 million and we recognized a pre-tax benefit of $12.5 million related to a change in the fair value of our contingent consideration liability.
[2] | In the quarter ended September 30, 2020, we recorded a pre-tax expense in the amount of $4.1 million related to a change in the fair value of our contingent consideration liability.
[3] | In the quarter ended June 30, 2020, we recorded a pre-tax expense in the amount of $4.2 million related to a change in the fair value of our contingent consideration liability.
[4] | In the quarter ended March 31, 2020, we recorded a pre-tax goodwill impairment charge of $18.1 million and we recognized a pre-tax benefit of $24.5 million related to a change in the fair value of our contingent consideration liability.

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- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. + 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=6371337&loc=d3e3550-109257 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=121326447&loc=d3e1505-109256 + Details
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121326447&loc=d3e1448-109256 + Details
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