Stock compensation expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	$ 271	$ 276	$ 1,472	$ 1,302
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	16	18	49	52
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	255	258	773	550
Employee Grant [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	0	0	50	50
Director Stock Award [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	$ 0	$ 0	$ 600	$ 650