Business Segment Data (Details) - Business Segment Data (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Revenues	$ 4,354us-gaap_Revenues	$ 6,464us-gaap_Revenues
Operating (loss) income:
Operating Income (Loss)	(605)us-gaap_OperatingIncomeLoss	(133)us-gaap_OperatingIncomeLoss
Interest expense, net	(50)us-gaap_InterestExpense	(70)us-gaap_InterestExpense
Warrant expense and change in warrant liabilities	(18)	47
Loss before income taxes	(673)	(156)
Income tax expense	(8)us-gaap_IncomeTaxExpenseBenefit	(6)us-gaap_IncomeTaxExpenseBenefit
Net loss	(681)us-gaap_NetIncomeLoss	(162)us-gaap_NetIncomeLoss
Operating Segments [Member] \| Digital Display Sales [Member]
Segment Reporting Information [Line Items]
Revenues	3,406	5,209
Operating (loss) income:
Operating Income (Loss)	(309)	270
Operating Segments [Member] \| Digital Display Lease And Maintenance [Member]
Segment Reporting Information [Line Items]
Revenues	948	1,255
Operating (loss) income:
Operating Income (Loss)	270	230
Corporate, Non-Segment [Member]
Operating (loss) income:
Operating Income (Loss)	$ (566)	$ (633)

Represents the amount of changes in warrant liabilities.

No definition available.

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-Glossary Income Tax Expense (or Benefit)

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Amount of the cost of borrowed funds accounted for as interest expense.

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-Name Accounting Standards Codification

-Topic 835

-SubTopic 20

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

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-Section 45

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-Name Accounting Standards Codification

-Topic 260

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-Name Accounting Standards Codification

-Glossary Other Comprehensive Income

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-Glossary Net Income

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-Name Accounting Standards Codification

-Topic 944

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 19

-Article 5

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-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 20

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The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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-Topic 225

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