Quarterly Financial Data (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Data [Abstract]
Revenues	$ 6,671us-gaap_Revenues	$ 7,875us-gaap_Revenues	$ 6,679us-gaap_Revenues	$ 7,299us-gaap_Revenues	$ 9,217us-gaap_Revenues	$ 5,227us-gaap_Revenues	$ 4,344us-gaap_Revenues	$ 5,383us-gaap_Revenues	$ 28,524us-gaap_Revenues	$ 24,171us-gaap_Revenues	$ 22,136us-gaap_Revenues
Gross profit	1,127us-gaap_GrossProfit	1,854us-gaap_GrossProfit	2,150us-gaap_GrossProfit	1,656us-gaap_GrossProfit	2,603us-gaap_GrossProfit	956us-gaap_GrossProfit	1,206us-gaap_GrossProfit	1,639us-gaap_GrossProfit	6,787us-gaap_GrossProfit	6,404us-gaap_GrossProfit	6,936us-gaap_GrossProfit
(Loss) income from continuing operations	(1,229)	77	(1,911)	(2,851)	(2,159)	(3,931)	(3,765)	(2,825)	(5,913)	(12,680)	(9,774)
Income (loss) from discontinued operations	(440)	(1,385)	(902)	166	160	2,217	(1,237)	265	(2,562)	1,405	(7,824)
Net loss	$ (1,669)us-gaap_NetIncomeLoss	$ (1,308)us-gaap_NetIncomeLoss	$ (2,813)us-gaap_NetIncomeLoss	$ (2,685)us-gaap_NetIncomeLoss	$ (1,999)us-gaap_NetIncomeLoss	$ (1,714)us-gaap_NetIncomeLoss	$ (5,002)us-gaap_NetIncomeLoss	$ (2,560)us-gaap_NetIncomeLoss	$ (8,475)us-gaap_NetIncomeLoss	$ (11,275)us-gaap_NetIncomeLoss	$ (17,598)us-gaap_NetIncomeLoss
Continuing operations, basic (usd per share)	$ (0.02)	$ 0.00	$ (0.03)	$ (0.04)	$ (0.03)	$ (0.06)	$ (0.05)	$ (0.04)	$ (0.08)	$ (0.18)	$ (0.14)
Discontinued operations, basic (usd per share)	$ (0.01)	$ (0.02)	$ (0.01)	$ 0.00	$ 0.00	$ 0.03	$ (0.02)	$ 0.00	$ (0.04)	$ 0.02	$ (0.11)
Net loss, basic (usd per share)	$ (0.02)us-gaap_EarningsPerShareBasic	$ (0.02)us-gaap_EarningsPerShareBasic	$ (0.04)us-gaap_EarningsPerShareBasic	$ (0.04)us-gaap_EarningsPerShareBasic	$ (0.03)us-gaap_EarningsPerShareBasic	$ (0.02)us-gaap_EarningsPerShareBasic	$ (0.07)us-gaap_EarningsPerShareBasic	$ (0.04)us-gaap_EarningsPerShareBasic	$ (0.12)us-gaap_EarningsPerShareBasic	$ (0.16)us-gaap_EarningsPerShareBasic	$ (0.25)us-gaap_EarningsPerShareBasic
Continuing operations, diluted (usd per share)	$ (0.02)	$ 0.00	$ (0.03)	$ (0.04)	$ (0.03)	$ (0.06)	$ (0.05)	$ (0.04)	$ (0.08)	$ (0.18)	$ (0.14)
Discontinued operations, diluted (usd per share)	$ (0.01)	$ (0.02)	$ (0.01)	$ 0.00	$ 0.00	$ 0.03	$ (0.02)	$ 0.00	$ (0.04)	$ 0.02	$ (0.11)
Net loss, diluted (usd per share)	$ (0.02)us-gaap_EarningsPerShareDiluted	$ (0.02)us-gaap_EarningsPerShareDiluted	$ (0.04)us-gaap_EarningsPerShareDiluted	$ (0.04)us-gaap_EarningsPerShareDiluted	$ (0.03)us-gaap_EarningsPerShareDiluted	$ (0.02)us-gaap_EarningsPerShareDiluted	$ (0.07)us-gaap_EarningsPerShareDiluted	$ (0.04)us-gaap_EarningsPerShareDiluted	$ (0.12)us-gaap_EarningsPerShareDiluted	$ (0.16)us-gaap_EarningsPerShareDiluted	$ (0.25)us-gaap_EarningsPerShareDiluted

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.

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Per diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.

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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).

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