Earnings per common share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator
Net income - basic and diluted	$ 1,653	$ 1,239	$ 3,425	$ 2,779
Denominator
Weighted average shares outstanding - basic ( in shares)	1,495	1,486	1,494	1,485
Weighted average shares outstanding - diluted (in shares)	1,495	1,486	1,494	1,485
Earnings per share - basic (in dollars per share)	$ 1.11	$ 0.83	$ 2.29	$ 1.87
Earnings per share - diluted (in dollars per share)	$ 1.11	$ 0.83	$ 2.29	$ 1.87