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Note 17 - Net Earnings Per Common Share - Reconciliation of the Denominator Used to Calculate Earnings Per Common Share (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Shares issued and outstanding at beginning of period (in shares)		41,495,957	35,980,047
Stock Issued During Period, Shares, New Issues (in shares)	1,260,042	2,245,229
Weighted average number of shares used in computing basic earnings per share (in shares)	42,755,999	38,225,276
Assumed exercise of stock options, net of shares assumed acquired under the Treasury Stock Method (in shares)	428,098	437,204
Number of shares used in computing diluted earnings per share (in shares)	43,184,097	38,662,480

X

- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

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Number of new stock issued during the period.

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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.

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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.

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