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Leases - Additional Information (Detail) (USD $)
 6 Months Ended 131 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2014
Component Of Operating Other Cost And Expense [Line Items]      
Rental expense     $ 4,924,000
Rental expenses include common area maintenance and real estate taxes 15,000    
Utilities costs per month 14,000    
Increase in total monthly expenditures 71,000    
Facility and equipment rent expense 264,000 281,000  
Corporate Headquarters In Pasadena
      
Component Of Operating Other Cost And Expense [Line Items]      
Capital lease expiration date Jul. 31, 2018    
Rental expense 22,000    
Percentage of increase in annual rental cost 3.00%    
Research Facility in Madison
      
Component Of Operating Other Cost And Expense [Line Items]      
Capital lease expiration date Feb. 28, 2019    
Rental expense 23,000    
Assets Held under Capital Leases
      
Component Of Operating Other Cost And Expense [Line Items]      
Monthly payments under capital lease $ 19,000