Collaborative Arrangements and Licensing Agreements, Achaogen, Inc. (Details) (Achaogen Inc [Member], Collaborations and Licensing Agreements [Member], USD $)	1 Months Ended	9 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 Drug	Mar. 31, 2014	Sep. 30, 2014 Maximum [Member]	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2006 Series A preferred stock [Member]	Sep. 30, 2014 Pre-specified events [Member]
Collaborative Arrangement and Licensing Agreement [Abstract]
Upfront fee in the form of equity securities						$ 1,500,000
Cumulative milestone payments earned under collaborative arrangement at period end							7,000,000
Milestone payment earned	4,000,000
Number of drugs to be developed and commercialized		2
Maximum amount of payment receivable							42,300,000
Next prospective milestone	7,500,000	7,500,000
Number of shares held after conversion (in shares)			148,000
Fair value of investment in Achaogen, Inc	$ 1,000,000	$ 1,000,000
Ownership interest percentage (in hundredths)				10.00%	10.00%