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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Data (Unaudited) | The following amounts are in thousands, except per share amounts:
|  | 1st Quarter |  | 2nd Quarter |  | 3rd Quarter |  | 4th Quarter
2013 |  |  |  |  |  |  |  |
Net revenue |  | $ | — |  |  | $ | — |  |  | $ | 1,170 |  |  | $ | 1,317 |
Gross profit on net revenue (1) |  | $ | — |  |  | $ | — |  |  | $ | 869 |  |  | $ | 967 |
Net loss |  | $ | (9,293 | ) |  | $ | (9,597 | ) |  | $ | (9,287 | ) |  | $ | (48,501 | )
Net loss per share |  | $ | (0.11 | ) |  | $ | (0.11 | ) |  | $ | (0.11 | ) |  | $ | (0.46 | )
2012 |  |  |  |  |  |  |  |
Net revenue |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Gross profit on net revenue |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Net loss |  | $ | (24,761 | ) |  | $ | (196 | ) |  | $ | (6,261 | ) |  | $ | (3,751 | )
Net loss per share |  | $ | (0.52 | ) |  | $ | — |  |  | $ | (0.09 | ) |  | $ | (0.05 | )
(1) | Gross profit for the quarter ended December 31, 2013 is calculated by taking net revenue less cost of revenue and amortization of certain acquired intangible assets, which is consistent with the gross profit reported for the quarter ended September 30, 2013.

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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 + Details
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