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Note 14 - Earnings Per Common Share - Summary of Basic and Diluted Earnings Per Common Share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Numerator for basic and diluted earnings per common share:
Net income for the year	$ 16,067,154	$ 11,373,730	$ 6,374,096
Basic weighted average number of common shares outstanding (in shares)	10,524,856	10,968,500	11,220,874
Effect of stock options (in shares)	188,739	391,584	509,524
Diluted weighted average number of shares outstanding (in shares)	10,713,595	11,360,084	11,730,398
Basic earnings per common share (in dollars per share)	$ 1.53	$ 1.04	$ 0.57
Diluted earnings per common share (in dollars per share)	$ 1.50	$ 1	$ 0.54

X

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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