Stock compensation expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation	$ 1,111	$ 1,372	$ 232
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation	69	92	112
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation	492	250	0
Employee Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation	50	530	0
Share-based Payment Arrangement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation	0	0	50
Director Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation	$ 500	$ 500	$ 70