Description of Operations and Summary of Significant Accounting Policies (Details)		3 Months Ended
	Apr. 30, 2013 Item	Mar. 31, 2014 GSK LABA collaboration and Strategic Alliance agreements
Business Separation
Number of independent publicly traded companies created as a result of the separation of businesses as approved by the Board of Directors	2
Potential royalty revenues (as a percent)		15.00%