Other Intangible Assets - Summary of Other Intangible Assets Net Consisting of Product Rights and Licenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 10,950	$ 10,950
Accumulated Amortization	(8,665)	(7,694)
Intangible Assets, net	$ 2,285	$ 3,256
Weighted Average [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average Useful Life	10 years 11 months 12 days	10 years 10 months 6 days
Product Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 9,050	$ 9,050
Accumulated Amortization	(7,052)	(6,177)
Intangible Assets, net	$ 1,998	$ 2,873
Product Rights [Member] | Weighted Average [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average Useful Life	9 years 1 month 10 days	9 years 1 month 17 days
Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 1,900	$ 1,900
Accumulated Amortization	(1,613)	(1,517)
Intangible Assets, net	$ 287	$ 383
Weighted average Useful Life	15 years
Licenses [Member] | Weighted Average [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average Useful Life	1 year 10 months 2 days	1 year 8 months 19 days