Segment Information Operating Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$ 44,077	$ 44,780	$ 47,049	$ 48,687	$ 48,174	$ 50,805	$ 49,964	$ 43,799	$ 184,593	$ 192,742	$ 237,863
Gross Profit	$ 13,918	$ 13,007	$ 12,601	$ 12,626	$ 13,950	$ 14,697	$ 12,007	$ 11,148	52,152	51,802	64,138
Operating Income (Loss)									(14,065)	(25,300)	(34,766)
Operating Segments [Member] | Software-Systems [Member]
Segment Reporting Information [Line Items]
Revenues									55,006	40,281	44,934
Gross Profit									31,997	24,949	25,860
Operating Income (Loss)									(1,900)	(6,169)	(7,974)
Operating Segments [Member] | Embedded Products and Hardware Services [Member]
Segment Reporting Information [Line Items]
Revenues									129,587	152,461	192,929
Gross Profit									28,311	35,449	47,603
Operating Income (Loss)									9,709	2,457	(25)
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Gross Profit									(8,156)	(8,596)	(9,325)
Operating Income (Loss)									$ (21,874)	$ (21,588)	$ (26,767)