Share-based compensation (Schedule Of Stock Option Activity) (Details) - MVIS - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Options, Outstanding as of beginning of period	2,427	1,905	1,318
Options, Granted	849	717	824
Options, Exercised	(23)	0	(23)
Options, Forfeited, or expired	(107)	(301)	(214)
Options, Outstanding as of end of period	3,146	2,427	1,905
Weighted-Average Exercise Prices, Outstanding as of beginnig of period	$ 6.72	$ 8.86	$ 13.71
Weighted-Average Exercise Prices, Granted	3.23	1.78	2.22
Weighted-Average Exercise Prices, Exercised	1.88	0	1.80
Weighted-Average Exercise Prices, Forfeited, cancelled or expired	13.98	9.49	13.86
Weighted-Average Exercise Prices, Outstanding as of end of period	$ 5.56	$ 6.72	$ 8.86
Options Outstanding, Weighted-Average Remaining Contractual Term (in years)	7 years 108 days	7 years 146 days	7 years 146 days
Options, Outstanding, Aggregate Intrinsic Value	$ 1,613	$ 18,700	$ 1,500	$ 0
Options, Vested and expected to vest at end of period	2,949
Weighted-Average Exercise Price, Vested and expected to vest	$ 5.75
Weighted-Average Remaining Contractual Term (in years), Vested and expected to vest	7 years 72 days
Options, Vested and expected to vest, Aggregate Intrinsic Value	$ 1,539
Options, Exercisable at end of period	1,582
Weighted-Average Exercise Price, Exercisable	$ 8.49
Weighted-Average Remaining Contractual Term (in years), Exercisable	5 years 288 days
Options, Exercisable, Aggregate Intrinsic Value	$ 906
Options, Exercises in Period, Intrinsic Value	29	0	21
Grant date fair value of options vested	$ 591	$ 3,300	$ 1,700