Other Intangible Assets - Summary of Other Intangible Assets Net Consisting of Product Rights and Licenses (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 10,950	$ 10,950
Accumulated Amortization	(6,724)	(5,753)
Intangible Assets, net	4,226	5,197
Weighted average Useful Life	10 years 9 months 18 days	10 years 9 months 7 days
Product Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	9,050	9,050
Accumulated Amortization	(5,302)	(4,427)
Intangible Assets, net	3,748	4,623
Weighted average Useful Life	9 years 1 month 21 days	9 years 1 month 24 days
Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,900	1,900
Accumulated Amortization	(1,422)	(1,326)
Intangible Assets, net	$ 478	$ 574
Weighted average Useful Life	14 years	1 year 7 months 13 days