Business Segment Data (Details) - Business Segment Data (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Revenues:
Revenues	$ 24,359	$ 20,907
Operating Income (Loss)	(4,252)	(3,496)
Corporate general and administrative expenses	9,164	8,072
Interest expense, net	(240)	(333)
Other income		194
Loss on sale of receivables – financing expense		(348)
Change in warrant liabilities	(107)	1,113
Loss from continuing operations before income taxes	(4,599)	(2,870)
Income tax (expense) benefit	(29)	370
Loss from continuing operations	(4,628)	(2,500)
Income from discontinued operations		631
Net loss	(4,628)	(1,869)
Assets:
Assets	15,245	18,505
Depreciation and amortization:
Depreciation and amortization	3,003	3,538
Capital expenditures:
Capital expenditures	127	293
Operating Segments [Member] | Digital Display Sales [Member]
Revenues:
Revenues	19,479	14,607
Operating Income (Loss)	(1,310)	(1,022)
Assets:
Assets	6,792	7,370
Depreciation and amortization:
Depreciation and amortization	122	167
Capital expenditures:
Capital expenditures	8	194
Operating Segments [Member] | Digital Display Lease And Maintenance [Member]
Revenues:
Revenues	4,880	6,300
Operating Income (Loss)	348	913
Assets:
Assets	7,802	11,080
Depreciation and amortization:
Depreciation and amortization	2,868	3,315
Capital expenditures:
Capital expenditures	44	96
Operating Segments [Member]
Assets:
Assets	14,594	18,450
Corporate, Non-Segment [Member] | Digital Display Sales [Member]
Revenues:
Corporate general and administrative expenses	(3,290)	(3,387)
Corporate, Non-Segment [Member]
Assets:
Assets	651	55
Depreciation and amortization:
Depreciation and amortization	13	56
Capital expenditures:
Capital expenditures	$ 75	$ 3