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Kolltan Acquisition - Pro Forma (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Nov. 29, 2016 | Dec. 31, 2016 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Kolltan Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |
Transaction expense |  | $ 700 |  |  |  |  |  |  |  |  |  | $ 700 |
Revenue. |  |  | $ 3,456 | $ 3,924 | $ 3,829 | $ 1,534 | $ 1,874 | $ 2,220 | $ 1,389 | $ 1,303 | $ 12,743 | 6,786 | $ 5,480
Kolltan |  |  |  |  |  |  |  |  |  |  |  |  |
Kolltan Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |
Severance expense |  | 3,100 |  |  |  |  |  |  |  |  |  |  |
Transaction expense | $ 3,768 |  |  |  |  |  |  |  |  |  |  |  |
Revenue. |  | $ 0 |  |  |  |  |  |  |  |  |  |  |
Pro Forma Financial Information |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  | 6,786 | 5,480
Net loss |  |  |  |  |  |  |  |  |  |  |  | $ (146,905) | $ (157,690)
Basic and Diluted Net Loss Per Common Share |  |  |  |  |  |  |  |  |  |  |  | $ (1.24) | $ (1.37)

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- Definition The pro forma basic and diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References No definition available. + Details
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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + 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 (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e1043-128460 + Details
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