Discontinued Operations (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Aug. 01, 2016	Sep. 30, 2016	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of outstanding shares distributed	100.00%
Record date for distribution	Jul. 22, 2016
Number of common stock distributed (in shares)	20,230,000
Aptevo [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Unsecured debt	$ 20,000
Term of manufacturing services contract	10 years
Term of transition services agreement	2 years
Revenues [Abstract]
Product sales		$ 3,019	$ 21,183
Contracts, grants and collaborations		68	187
Total revenues		3,087	21,370
Operating expense [Abstract]
Cost of product sales		907	11,556
Research and development		2,509	18,024
Selling, general and administrative		7,499	23,792
Income (loss) from operations		(7,828)	(32,002)
Other income (expense), net [Abstract]
Other income (expense), net		(116)	(41)
Income (loss) from discontinued operations before provision for (benefit from) income taxes		(7,944)	(32,043)
Provision for (benefit from) income taxes		(8,896)	(16,189)
Net Income (loss) from discontinued operations		$ 952	(15,854)
Net Cash Provided by (Used in) Discontinued Operations [Abstract]
Net cash used in operating activities			(10,299)
Net cash used in investing activities			(1,926)
Net cash provided by financing activities			7,733
Net decrease in cash and cash equivalents			$ (4,492)