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Summary of Significant Accounting Policies - Summary of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]    
Gross $ 36,447 $ 36,714
Accumulated Amortization (16,004) (14,488)
Net 20,443 22,226
Customer List [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period (Years) 10 years 10 years
Gross 11,741 11,795
Accumulated Amortization (3,250) (2,701)
Net 8,491 9,094
Patents and Product Rights [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Gross 10,449 10,449
Accumulated Amortization (7,732) (7,466)
Net 2,717 2,983
Patents and Product Rights [Member] | Minimum [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period (Years) 3 years 3 years
Patents and Product Rights [Member] | Maximum [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period (Years) 10 years 10 years
Acquired Technology [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period (Years) 7 years 7 years
Gross 9,120 9,162
Accumulated Amortization (3,551) (2,952)
Net 5,569 6,210
Tradename [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period (Years) 15 years 15 years
Gross 4,500 4,521
Accumulated Amortization (861) (715)
Net 3,639 3,806
Non-compete Agreements [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Gross 637 787
Accumulated Amortization (610) (654)
Net $ 27 $ 133
Non-compete Agreements [Member] | Minimum [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period (Years) 1 year 1 year
Non-compete Agreements [Member] | Maximum [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period (Years) 3 years 3 years