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Commitments and Contingencies - Additional Information (Detail) | 3 Months Ended
--- | ---
Dec. 31, 2015 USD ($) ft² | Dec. 31, 2014 USD ($)
Other Commitments [Line Items] |  |
Facility rent expense | $ 198,600 | $ 171,500
Provision for recorded liabilities | 0 |
Future commitments | 47,500,000 |
Commitments expected to be incurred in fiscal 2016 | 25,200,000 |
Commitments expected to be incurred beyond fiscal 2016 | 23,300,000 |
Corporate Headquarters In Pasadena |  |
Other Commitments [Line Items] |  |
Rental expense | $ 24,000 |
Operating lease expiration month and year | 2019-09 |
Percentage of increase in annual rental cost | 3.00% |
Office space leases, in square feet | ft² | 8,500 |
Research Facility in Madison |  |
Other Commitments [Line Items] |  |
Rental expense | $ 26,000 |
Operating lease expiration date | Feb. 28, 2019 |
Other rental expenses including common area maintenance and real estate taxes | $ 18,000 |
Utilities costs per month | 16,000 |
Monthly payments under capital lease | 19,000 |
Total Monthly Facility Expense - Madison facility | 79,000 |
Research Facility in Middleton |  |
Other Commitments [Line Items] |  |
Rental expense | $ 4,000 |
Operating lease expiration month and year | 2016-05 |
Other rental expenses including common area maintenance and real estate taxes | $ 2,000 |

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