Stock compensation expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	$ 1,569	$ 1,111	$ 1,372
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	69	69	92
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	800	492	250
Employee Grant [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	50	50	530
Director Stock Award [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	$ 650	$ 500	$ 500