Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share
Net income	$ 4,473	$ 6,524
Income allotted to participating securities	(11)	(35)
Net income available to common shareholders	$ 4,462	$ 6,489
Weighted-average number of shares used in:
Basic earnings per share (in shares)	9,237,466	9,169,256
Dilutive common stock equivalents:
Stock options and restricted stock units (in shares)	82,133	143,883
Diluted earnings per share (in shares)	9,319,599	9,313,139
Net income per common share, basic (in dollars per share)	$ 0.48	$ 0.71
Net income per common share, diluted (in dollars per share)	$ 0.48	$ 0.70

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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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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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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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