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Fair Value Measurements - Additional Information (Detail) € in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 EUR (€)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Contingent consideration | $ 3,200,000 | $ 11,041,000 |  |  |  |
Contingent consideration liability, noncurrent |  | 3,425,000 |  |  |  |
Level 3 assets | 0 | 0 |  |  |  |
Transfers in or out Level 3, Assets | 0 | 0 |  |  |  |
Transfers in or out Level 3, Liabilities | 0 | $ 0 |  |  |  |
Minimum [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Percentage of Probability Achievement of Contingent Consideration payment. |  | 5.00% |  |  |  |
Maximum [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Percentage of Probability Achievement of Contingent Consideration payment. |  | 95.00% |  |  |  |
Contingent Consideration [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Foreign currency gains (losses) | $ 100,000 | $ 100,000 | $ (500,000) |  |  |
Contingent Consideration [Member] | Revenue Based Milestones [Member] | Discount Rate [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Fair value measurement inputs | 20.5 |  |  |  |  |
Contingent Consideration [Member] | Non Revenue Based Milestones | Discount Rate [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Fair value measurement inputs |  | 6.0 |  |  |  | 6.0
Creagh Medical Ltd [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Contingent consideration related to acquisition |  | $ 11,000,000 |  |  | $ 11,000,000 | € 9.6
Business combination contingent consideration liability percentage | 2.30% |  |  |  |  |
Scenario Forecast [Member] | NorMedix [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Contingent consideration related to acquisition |  |  |  | $ 3,200,000 |  |
Level 3 Liabilities [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Contingent consideration | $ 3,200,000 |  |  |  |  |
Contingent consideration liability |  | 14,500,000 |  |  |  |
Contingent consideration liability, noncurrent |  | $ 3,400,000 |  |  |  |

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