Business Segment Data (Details) - Business Segment Data (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Revenue	$ 6,204,000	$ 5,921,000	$ 15,087,000	$ 18,362,000
Operating (loss) income:
Operating Income (Loss)	(286,000)	(1,043,000)	(2,553,000)	(3,696,000)
Interest expense, net	(15,000)	(90,000)	(98,000)	(184,000)
Loss on sale of receivables			(348,000)
Gain on debt extinguishment				60,000
Change in warrant liabilities	296,000	1,379,000	960,000	3,276,000
Income loss from continuing operations before income taxes	176,000	246,000	(1,858,000)	(544,000)
Income tax expense	(8,000)	(7,000)	(24,000)	(21,000)
Income loss from continuing operations	168,000	239,000	(1,882,000)	(565,000)
Operating Segments [Member] | Digital Display [Member]
Revenues:
Revenue	4,607,000	4,250,000	10,345,000	13,101,000
Operating (loss) income:
Operating Income (Loss)	(51,000)	(67,000)	(1,828,000)	(1,577,000)
Operating Segments [Member] | Digital Display Lease And Maintenance [Member]
Revenues:
Revenue	1,597,000	1,671,000	4,742,000	5,261,000
Operating (loss) income:
Operating Income (Loss)	430,000	88,000	773,000	456,000
Corporate, Non-Segment [Member]
Operating (loss) income:
Corporate general and administrative expenses	(665,000)	(1,064,000)	(1,498,000)	(2,575,000)
Segment Reconciling Items [Member]
Operating (loss) income:
Interest expense, net	(1,000)	(90,000)	(84,000)	(184,000)
Other income	$ 167,000		$ 167,000