Summary of Significant Accounting Policies (Details 9) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue
License fees	$ 1,597	$ 2,072	$ 5,681	$ 6,158
Sensor modules	39	211	176	634
Non-recurring engineering	287	22	317	174
Total Revenues	1,923	$ 2,305	6,174	$ 6,966
Balances excluding revenue standard [Member]
Revenue
License fees	1,919		5,939
Sensor modules	39		176
Non-recurring engineering	287		317
Total Revenues	2,245		6,432
Impact of Revenue Standard [Member]
Revenue
License fees	(322)		(258)
Sensor modules
Non-recurring engineering
Total Revenues	$ (322)		$ (258)