Business Segment Data (Details) - Business Segment Data (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$ 20,907,000	$ 23,021,000
Operating Income (Loss)	(3,496,000)	(4,910,000)
Interest expense, net	(333,000)	(297,000)
Other income	181,000
Loss on sale of receivables - financing expense	(348,000)
Gain on debt extinguishment	13,000	60,000
Change in warrant liabilities	1,113,000	4,041,000
Loss from continuing operations before income taxes	(2,870,000)	(1,106,000)
Income tax benefit (expense)	370,000	(112,000)
Loss from continuing operations	(2,500,000)	(1,218,000)
Income (loss) from discontinued operations	631,000	(147,000)
Net loss	(1,869,000)	(1,365,000)
Assets	18,505,000	22,082,000
Depreciation and amortization	3,538,000	4,104,000
Capital expenditures	293,000	556,000
Corporate general and administrative expenses	8,072,000	8,916,000
Operating Segments [Member] | Digital Display Sales [Member]
Segment Reporting Information [Line Items]
Revenues	14,607,000	16,065,000
Operating Income (Loss)	(2,050,000)	(2,832,000)
Assets	7,370,000	6,504,000
Depreciation and amortization	167,000	135,000
Capital expenditures	194,000	62,000
Operating Segments [Member] | Digital Display Lease And Maintenance [Member]
Segment Reporting Information [Line Items]
Revenues	6,300,000	6,956,000
Operating Income (Loss)	913,000	707,000
Assets	11,080,000	13,677,000
Depreciation and amortization	3,315,000	3,804,000
Capital expenditures	96,000	487,000
Operating Segments [Member]
Segment Reporting Information [Line Items]
Assets	18,450,000	20,181,000
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Assets	55,000	1,164,000
Depreciation and amortization	56,000	165,000
Capital expenditures	3,000	7,000
Corporate general and administrative expenses	$ (2,359,000)	$ (2,785,000)