Earnings per share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares

The table below presents the increase in average shares outstanding, using the treasury stock method, for the diluted earnings per share calculation for the years indicated:

	2020	2019	2018
Basic weighted average common shares outstanding	11,897,813	11,789,570	11,679,520
Dilutive shares	21,695	40,248	70,942
Diluted weighted average common shares outstanding	11,919,508	11,829,818	11,750,462