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Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |
Summary of Quarterly Financial Data | The following table sets forth certain unaudited quarterly financial data for the eight quarters ended December 31, 2013.
|  | 2013 |  |  | 2012 |
|  | Q1 |  |  | Q2 |  |  | Q3 |  |  | Q4 |  |  | Q1 |  |  | Q2 |  |  | Q3 |  |  | Q4 |
Revenues |  | $ | 4,623 |  |  | $ | 6,934 |  |  | $ | 5,707 |  |  | $ | 6,869 |  |  | $ | 3,243 |  |  | $ | 4,574 |  |  | $ | 4,907 |  |  | $ | 8,931 |
Expenses |  | $ | 11,528 |  |  | $ | 12,402 |  |  | $ | 11,866 |  |  | $ | 15,043 |  |  | $ | 10,526 |  |  | $ | 10,318 |  |  | $ | 10,709 |  |  | $ | 12,300 |
Net loss |  | $ | (6,885 | ) |  | $ | (5,450 | ) |  | $ | (6,145 | ) |  | $ | (8,144 | ) |  | $ | (7,268 | ) |  | $ | (5,728 | ) |  | $ | (5,790 | ) |  | $ | (3,478 | )
Net loss per share |  | $ | (0.13 | ) |  | $ | (0.10 | ) |  | $ | (0.11 | ) |  | $ | (0.13 | ) |  | $ | (0.13 | ) |  | $ | (0.11 | ) |  | $ | (0.11 | ) |  | $ | (0.07 | )

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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=25249566&loc=d3e1280-108306 + Details
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