Stock compensation expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	$ 1,738	$ 1,569	$ 1,111
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	60	69	69
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	1,028	800	492
Employee Grant [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	50	50	50
Director Stock Award [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	$ 600	$ 650	$ 500