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Note 16 - Net Earnings Per Common Share - Reconciliation of the Denominator Used to Calculate Earnings Per Common Share (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Shares issued and outstanding at beginning of period (in shares)	38,934,161	38,648,461
Weighted average number of shares: Issued during the period (in shares)	221,293	181,523
Weighted average number of shares used in computing basic earnings per share (in shares)	39,155,454	38,829,984
Assumed exercise of stock options acquired under the Treasury Stock Method (in shares)	639,161	477,870
Number of shares used in computing diluted earnings per share (in shares)	39,794,615	39,307,854

X

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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X

- 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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