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Commitments and Contingencies - Additional Information (Detail) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Other Commitments [Line Items] |  |  |  |
Facility and equipment rent expense | $ 182,000 | $ 138,000 | $ 544,000 | $ 403,000
Provision for recorded liabilities | 0 |  | 0 |
Future commitments | 51,000,000 |  | 51,000,000 |
Commitments expected to be incurred in fiscal 2015 | 13,000,000 |  | 13,000,000 |
Commitments expected to be incurred beyond fiscal 2015 | $ 38,000,000 |  | 38,000,000 |
Corporate Headquarters In Pasadena |  |  |  |
Other Commitments [Line Items] |  |  |  |
Rental expense |  |  | $ 23,000 |
Operating lease expiration date |  |  | Sep. 30, 2019 |
Percentage of increase in annual rental cost |  |  | 3.00% |
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 |

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