v3.8.0.1

Quarterly Financial Data (Unaudited) - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |
Royalty and license fee |  |  |  |  |  | $ 31,787 | $ 33,203 | $ 31,763
Acquisition related costs including due diligence and integration expenses |  |  |  |  |  |  | 3,187 |
Royalty catch-up payment |  |  | $ 2,900 |  |  |  |  |
Income tax provision |  |  |  |  |  | $ 3,107 | $ 6,963 | $ 6,294
ASU No. 2016-09 [Member] |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |
Income tax provision |  | $ 500 |  |  |  |  |  |
Out of Period Royalty Adjustment [Member] |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |
Royalty and license fee |  |  |  | $ 1,100 |  |  |  |
Previously Reported [Member] |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |
Royalty and license fee |  |  |  | $ 1,000 |  |  |  |
Creagh Medical and NorMedix [Member] |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |
Acquisition related costs including due diligence and integration expenses |  |  |  |  | $ 2,500 |  |  |
Intellectual Property [Member] |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |
Royalty and license fee | $ 1,100 |  |  |  |  |  |  |

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