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Subsequent Events (Detail) - USD ($) $ in Thousands | Aug. 07, 2017 | May 08, 2013
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Subsequent Event [Line Items] |  |
Number of shares availabe from warrants |  | 9,109
Subsequent Event | Out-Of-The-Money Warrants |  |
Subsequent Event [Line Items] |  |
Number of shares availabe from warrants | 2,556,851 |
Galena Biopharma, Inc | Subsequent Event |  |
Subsequent Event [Line Items] |  |
Ownership percentage by Parent | 32.50% |
Galena Biopharma, Inc | SELLAS | Subsequent Event |  |
Subsequent Event [Line Items] |  |
Percentage of voting interests acquired | 67.50% |
Termination fee in a merger agreement | $ 750 |
Expense reimbursement in a merger agreement | $ 100 |

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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- Details
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- Details
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