Quarterly report pursuant to Section 13 or 15(d)

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)

v2.4.0.6
Organization and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended 9 Months Ended 1 Months Ended 10 Months Ended
Mar. 31, 2012
Jun. 30, 2012
Sep. 30, 2012
Oct. 31, 2012
Subsequent Event [Member]
Oct. 31, 2012
Subsequent Event [Member]
Organization and Summary of Significant Accounting Policies (Textual) [Abstract]          
Collaboration agreement upfront payment $ 25        
Milestone payments earned       10.0 42.5
Milestone payments received   20      
Milestone payment due         22.5
Potential milestone payments         $ 42.5
Merck's percentage share of worldwide development expenses     70.00%