Stock compensation expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	$ 829	$ 652	$ 1,026	$ 854
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	17	18	34	35
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock compensation	162	134	292	269
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	$ 650	$ 500	$ 650	$ 500