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Organization and Description of the Business (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 16, 2015 | Mar. 31, 2015 | Dec. 31, 2015 | Dec. 31, 2014
Retained earnings (accumulated deficit) |  |  | $ (362,522,000) | $ (362,006,000)
Proceeds from issuance of private placement, net of offering costs |  |  | $ 12,384,000 |
Private Placement [Member] |  |  |  |
Proceeds from issuance of private placement, gross | $ 13,000,000 | $ 13,000,000 |  |
Proceeds from issuance of private placement, net of offering costs |  | $ 12,400,000 |  |

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- Definition Represents the proceeds from issuance of private placement, net of comissions to placement agents. + References No definition available. + Details
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- Definition The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31(a)(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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