Divestiture of Automatic License Plate Recognition Business (Details 1) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Divestiture of Automatic License Plate Recognition Business [Abstract]
Non-current assets from discontinued operations	$ 0	$ 420
Non-current liabilities from discontinued operations	0	0
License Plate Recognition (TagMaster AB) [Member]
Divestiture of Automatic License Plate Recognition Business [Abstract]
Non-current assets from discontinued operations	0	0
Trade accounts payable	0	0
Other current liabilities	0	0
Current liabilities from discontinued operations	0	0
Non-current liabilities from discontinued operations	0	0
Accounts receivable, net	0	0
Inventories		0
Other current assets	0	420
Current assets from discontinued operations	0	420
Property and equipment, net:	0	0
Intangible assets, net	$ 0	$ 0