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Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Data [Abstract]

Summary of quarterly financial data

The following table sets forth certain unaudited quarterly financial data for the eight quarters ended December 31, 2012.

		2012																2011
		Q1				Q2				Q3				Q4				Q1				Q2				Q3				Q4
Revenues		$	3,243			$	4,574			$	4,907			$	8,931			$	2,200			$	1,514			$	1,857			$	4,748
Expenses		$	10,526			$	10,318			$	10,709			$	12,300			$	11,801			$	11,795			$	11,431			$	11,113
Net loss		$	(7,268	)		$	(5,728	)		$	(5,790	)		$	(3,478	)		$	(9,578	)		$	(10,259	)		$	(9,554	)		$	(6,359	)
Net loss per share		$	(0.13	)		$	(0.11	)		$	(0.11	)		$	(0.07	)		$	(0.21	)		$	(0.20	)		$	(0.18	)		$	(0.12	)

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- Definition

Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 270

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)-(j)

-URI http://asc.fasb.org/extlink&oid=20225539&loc=d3e1280-108306

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