Summary of Significant Accounting Policies - Goodwill, Intangibles and Long-Lived Assets - Additional Information (Detail) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2013 USD ($)	Sep. 30, 2013 USD ($)	Dec. 31, 2015 USD ($) Method	Dec. 31, 2013 USD ($)	Dec. 31, 2014 USD ($)
Schedule Of Accounting Policies [Line Items]
Number of methods utilized to derive the fair value of the business | Method			2
Carrying amount			$ 20,496		$ 27,191
Impairment of intangible assets				$ 17,175
Impairment charge on assets held for sale				6,406
Property, plant and equipment, net			86,517		96,014
Land [Member]
Schedule Of Accounting Policies [Line Items]
Carrying value		$ 7,500
Net proceeds from sale of land	$ 1,100
Land [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. [Member]
Schedule Of Accounting Policies [Line Items]
Impairment charge on assets held for sale		6,400
Fixed Assets Dedicated to R&D Activities [Member]
Schedule Of Accounting Policies [Line Items]
Property, plant and equipment, net			4,600
Cardiolite Trademark [Member]
Schedule Of Accounting Policies [Line Items]
Carrying amount	19,200			19,200
Impairment of intangible assets				15,400
Fair value	3,800			$ 3,800
Customer Relationships [Member]
Schedule Of Accounting Policies [Line Items]
Carrying amount			$ 12,173		$ 16,442
Impairment of intangible assets	$ 700	$ 1,000