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Fair Value Measurement - Additional Information (Detail) € in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2016 EUR (€) | Sep. 30, 2015 USD ($) | May 24, 2016 USD ($) | Apr. 01, 2016 USD ($) | Apr. 01, 2016 EUR (€)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Fair value of other assets | $ 0 |  | $ 0 |  |  |  |  |
Fair value of other liabilities | 0 |  | 0 |  |  |  |  |
Payment of contingent considerations |  |  | 498,000 |  | $ 99,000 |  |  |
Increase to milestone payment | 675,000 | $ 233,000 | $ 3,317,000 |  | $ 2,114,000 |  |  |
2.125% Convertible Senior Notes due 2021 |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  | $ 115,000,000 |  |
Notes, due date |  |  | Jun. 01, 2021 | Jun. 01, 2021 |  |  |  |
Notes, frequency of periodic payment |  |  | Semi-annually | Semi-annually |  |  |  |
Notes, date of first required payment |  |  | Dec. 01, 2016 | Dec. 01, 2016 |  |  |  |
Total convertible senior notes | 94,318,000 |  | $ 94,318,000 |  |  |  |  |
Fair value of convertible senior notes | 131,800,000 |  | 131,800,000 |  |  |  |  |
Refine Technology, LLC | Milestone Payments |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Payment of contingent considerations |  |  | 4,350,000 |  |  |  |  |
Atoll GmbH |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Accrued Balance |  |  |  |  |  |  | $ 952,000 |
Bio Flash |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Payment of contingent considerations |  |  | 500,000 |  |  |  |  |
Bio Flash | Selling, general and administrative |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Payment of contingent considerations |  |  | 199,000 |  |  |  |  |
Bio Flash | Minimum |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Royalty payment |  |  | 130,000 |  |  |  |  |
Bio Flash | Contingent Consideration |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Payment of contingent considerations |  |  | 301,000 |  |  |  |  |
Significant unobservable inputs (Level 3) | Refine Technology, LLC | Milestone Payments |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Increase to milestone payment |  |  | 3,156,000 |  |  |  |  |
Accrued Balance | 5,175,000 |  | 5,175,000 |  |  |  |  |
Significant unobservable inputs (Level 3) | Atoll GmbH | Milestone Payments |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Increase to milestone payment |  |  | 148,000 | € 132 |  |  |  |
Accrued Balance | $ 1,085,000 |  | $ 1,085,000 |  |  |  | $ 928,000 | € 836

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