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Fair Value Measurement - Additional Information (Detail) € in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 EUR (€)	May 24, 2016 USD ($)	Apr. 01, 2016 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of other assets	$ 0		$ 0
Fair value of other liabilities	0		0
Increase to milestone payment	$ 637,000	$ 768,000	2,642,000	$ 1,881,000
Payment of contingent considerations			$ 498,000	$ 99,000
2.125% Convertible Senior Notes due 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Principal amount						$ 115,000,000
Notes, interest rate	2.125%		2.125%		2.125%	2.125%
Notes, due date			Jun. 01, 2021
Notes, frequency of periodic payment			Semi-annually
Notes, date of first required payment			Dec. 01, 2016
Total convertible senior notes	$ 93,380,000		$ 93,380,000
Fair value of convertible senior notes	124,300,000		124,300,000
Refine Technology, LLC
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Increase to milestone payment			2,629,000
Refine Technology, LLC | Milestone Payments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Payment of contingent considerations			4,350,000
Bio Flash | Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Royalty payment			130,000
Atoll GmbH
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accrued Balance	928,000		928,000		€ 836		$ 952,000
Significant unobservable inputs (Level 3) | Refine Technology, LLC | Milestone Payments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Increase to milestone payment			2,629,000
Accrued Balance	4,648,000		4,648,000
Significant unobservable inputs (Level 3) | Atoll GmbH | Milestone Payments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accrued Balance	$ 928,000		$ 928,000		€ 836

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Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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