Leases - Additional Information (Detail) (USD $)	3 Months Ended		128 Months Ended	1 Months Ended	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Aug. 31, 2012 Corporate Headquarters In Pasadena	Dec. 31, 2013 Research Fcility In Madison	Dec. 31, 2013 Assets Held under Capital Leases
Component Of Operating Other Cost And Expense [Line Items]
Rental expense			$ 4,790,000	$ 13,000	$ 22,000
Capital lease expiration date				Jan. 31, 2018	Feb. 28, 2019
Percentage of increase in annual rental cost				3.00%
Rental expenses include common area maintenance and real estate taxes	13,000
Utilities costs per month	15,000
Monthly payments under capital lease						21,000
Increase in total monthly expenditures	71,000
Facility and equipment rent expense	$ 130,000	$ 145,000