Revenue Contract Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Movement in Deferred Revenue [Roll Forward]
Contract with Customer, Liability	$ (4,855)	$ (4,282)
Contract with Customer, Liability	(12,242)	(5,892)
Equipment revenue [Member]
Movement in Deferred Revenue [Roll Forward]
Increase (Decrease) in Deferred Revenue	3,263	2,669
Deferred Revenue, Additions	(10,347)	(3,860)
Software revenue [Member]
Movement in Deferred Revenue [Roll Forward]
Increase (Decrease) in Deferred Revenue	3,340	1,947
Deferred Revenue, Additions	$ (3,643)	$ (2,366)