Other Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 83,586	$ 52,950
Accumulated Amortization	21,331	16,247
Intangible Assets, net	62,255	36,703
Product Rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	6,050	6,050
Accumulated Amortization	5,864	5,442
Intangible Assets, net	186	608
License and Distribution Rights | BELBUCA
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	45,000	45,000
Accumulated Amortization	12,374	9,000
Intangible Assets, net	32,626	36,000
License and Distribution Rights | Symproic
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	30,636
Accumulated Amortization	1,218
Intangible Assets, net	29,418
Licenses
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,900	1,900
Accumulated Amortization	1,875	1,805
Intangible Assets, net	$ 25	$ 95