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Quarterly Financial Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of selected quarterly financial information
Net revenues	$ 1,009	$ 1,076	$ 1,084	$ 548	$ 2,320	$ 1,679	$ 1,974	$ 1,164	$ 3,717	$ 7,137	$ 6,067
Cost of revenues	199	765	662	16	385	337	494	249	1,642	1,465	908
Gross margin	810	311	422	532	1,935	1,342	1,480	915	2,075	5,672	5,159
Net loss	$ (3,047)	$ (3,343)	$ (3,120)	$ (3,570)	$ (2,128)	$ (2,144)	$ (3,427)	$ (1,588)	$ (13,080)	$ (9,287)	$ (17,145)
Basic and diluted loss per share	$ (0.08)	$ (0.09)	$ (0.09)	$ (0.11)	$ (0.07)	$ (0.06)	$ (0.10)	$ (0.05)	$ (0.37)	$ (0.28)	$ (0.64)

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The aggregate cost of goods produced and sold and services rendered during the reporting period.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or 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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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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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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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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