Divestiture of Automatic License Plate Recognition Business (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]
Net revenue	$ 77	$ 1,409
Operating loss from discontinued operations	(134)	(2,538)
Loss on Sale of discontinued operations	(1,081)	(1,081)
Net loss on discontinued operations, net of tax	$ (1,215)	$ (3,619)