v3.8.0.1

Commitments and Contingencies - Additional Information (Detail) | 1 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Nov. 30, 2017 USD ($) ft² | Sep. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Jun. 30, 2015 USD ($) | Sep. 30, 2017 USD ($) € / $ shares | Sep. 30, 2017 EUR (€) shares | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 29, 2015 USD ($)
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Agreed to pay the customer and settlement of claim |  |  |  |  |  |  |  |  | $ 2,500,000
Undisputed royalties earned |  |  |  |  |  |  |  |  | $ 500,000
Revenue recognized by company |  | $ 500,000 |  |  |  |  |  |  |
Pre tax compensation expense |  | $ 2,500,000 |  |  |  |  |  |  |
Additional shares of common stock to stockholders | shares |  |  |  |  | 480,059 | 480,059 |  |  |
License agreement commencement date |  |  |  |  | 2006-03 | 2006-03 |  |  |
Annual minimum payments for licenses |  |  |  |  | $ 236,000 | € 200,000 |  |  |
Exchange rate relating to license payment | € / $ |  |  |  |  | 1.1801 |  |  |  |
Future minimum payments associated with license |  |  |  |  | $ 2,400,000 |  |  |  |
Rent expense related to operating leases |  |  |  |  | 100,000 |  | $ 100,000 | $ 100,000 |
CRO [Member] |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Contractual obligations |  |  |  |  | 26,000,000 |  |  |  |
Contractual obligation to be paid |  |  |  |  | 23,200,000 |  |  |  |
CRO [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Contractual obligation due in next several years |  |  |  |  | 32,000,000 |  |  |  |
CRO [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Contractual obligation due in next several years |  |  |  |  | $ 40,000,000 |  |  |  |
Subsequent Event [Member] | Eden Prairie Minnesota [Member] |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Square feet of office and R&D facility | ft² | 36,000 |  |  |  |  |  |  |  |
Contractual obligations | $ 4,000,000 |  |  |  |  |  |  |  |
Operating lease agreement term | 10 years |  |  |  |  |  |  |  |
Operating lease agreement expected commencement date | 2018-05 |  |  |  |  |  |  |  |
Patents [Member] |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Patent expiry date |  |  |  |  | 2027-09 | 2027-09 |  |  |
January 2009 through September 2014 [Member] |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Royalties overpaid |  |  | $ 5,700,000 | $ 5,700,000 |  |  |  |  |

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