Segment Information (Schedule Of Income (Loss) From Operations By Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Loss from operations	$ (11,934)	$ (10,984)	$ (52,405)	$ (36,172)
Reportable Geographical Components
Loss from operations	(11,934)	(10,984)	(52,405)	(36,172)
Americas | Operating Segments
Loss from operations	(21,183)	(16,599)	(72,039)	(50,122)
EMEA | Operating Segments
Loss from operations	7,105	386	13,499	(2,948)
Asia Pacific | Operating Segments
Loss from operations	$ 2,144	$ 5,229	$ 6,135	$ 16,898