Revenue Net contract assets (liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Net contract assets (liabilities) [Abstract]
Contract with Customer, Asset, Gross, Current	$ 275	$ 530
Contract with Customer, Asset, Explanation of Change	(255)
Contract with Customer, Liability, Current	(15)	(15)
Contract with Customer, Liability, Explanation of Change	0
Contract with Customer, Asset, Net, Current	260	$ 515
Contract with Customer, Net, Explanation of Change	$ (255)