Segment Information Operating Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenues	$ 40,561	$ 55,397	$ 61,288	$ 55,146	$ 44,780	$ 47,049	$ 48,687	$ 44,077	$ 212,392	$ 184,593	$ 192,742
Gross Profit	$ 13,613	$ 14,246	$ 15,445	$ 12,784	$ 13,007	$ 12,601	$ 12,626	$ 13,918	56,088	52,152	51,802
Operating Income (Loss)									(9,659)	(14,065)	(25,300)
Operating Segments | Software-Systems
Segment Reporting Information [Line Items]
Revenues									56,783	55,006	40,281
Gross Profit									34,488	31,997	24,949
Operating Income (Loss)									(18)	(1,900)	(6,169)
Operating Segments | Hardware Solutions
Segment Reporting Information [Line Items]
Revenues									155,609	129,587	152,461
Gross Profit									29,660	28,311	35,449
Operating Income (Loss)									9,820	9,709	2,457
Corporate and other
Segment Reporting Information [Line Items]
Gross Profit									(8,060)	(8,156)	(8,596)
Operating Income (Loss)									$ (19,461)	$ (21,874)	$ (21,588)