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Note 6 - EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2023
EARNINGS PER SHARE |
Schedule of computation of earnings per share on a basic and diluted basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Three months ended | ​ | Six months ended | ​ | ​
​ | ​ | ​ | June 30, | ​ | June 30, | ​ | ​
​ | ​ | ​ | 2023 |  | ​ | 2022 |  | ​ | 2023 |  | ​ | 2022 | ​ | ​
​ | ​ | (dollars in thousands, except share data) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ | $ | 28,425 | ​ | $ | 15,242 | ​ | $ | 55,582 | ​ | $ | 38,866 | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic EPS | ​ | $ | 1.70 | ​ | $ | 0.88 | ​ | $ | 3.32 | ​ | $ | 2.36 | ​ | ​
Diluted EPS | ​ | $ | 1.69 | ​ | $ | 0.87 | ​ | $ | 3.29 | ​ | $ | 2.33 | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average common shares outstanding | ​ |  | 16,701,950 | ​ |  | 17,345,324 | ​ |  | 16,739,120 | ​ |  | 16,485,218 | ​ | ​
Weighted average common shares issuable upon exercise of stock options | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
and under the employee stock purchase plan* | ​ |  | 97,577 | ​ |  | 203,783 | ​ |  | 131,710 | ​ |  | 215,464 | ​ | ​
Weighted average common and common equivalent shares outstanding | ​ |  | 16,799,527 | ​ |  | 17,549,107 | ​ |  | 16,870,830 | ​ |  | 16,700,682 | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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