Other Intangible Assets - Summary of Other Intangible Assets Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 91,092	$ 81,686
Accumulated Amortization	(29,544)	(28,310)
Intangible  Assets, net	61,548	53,376
License and Distribution Rights | BELBUCA
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	45,000	45,000
Accumulated Amortization	(22,500)	(18,000)
Intangible  Assets, net	22,500	27,000
License and Distribution Rights | Symproic
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	30,636	30,636
Accumulated Amortization	(6,695)	(4,260)
Intangible  Assets, net	23,941	26,376
Product rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value		6,050
Accumulated Amortization		(6,050)
Intangible  Assets, net		$ 0
Product rights | ELYXYB
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	15,456
Accumulated Amortization	(349)
Intangible  Assets, net	$ 15,107
Remaining Weighted  average Useful Life
Finite-Lived Intangible Assets [Line Items]
Remaining Weighed average Useful Life (in years)	8 years 6 months	7 years 10 months 24 days
Remaining Weighted  average Useful Life | License and Distribution Rights | BELBUCA
Finite-Lived Intangible Assets [Line Items]
Remaining Weighed average Useful Life (in years)	5 years 3 months 18 days	6 years
Remaining Weighted  average Useful Life | License and Distribution Rights | Symproic
Finite-Lived Intangible Assets [Line Items]
Remaining Weighed average Useful Life (in years)	10 years 3 months 18 days	10 years 9 months 18 days
Remaining Weighted  average Useful Life | Product rights | ELYXYB
Finite-Lived Intangible Assets [Line Items]
Remaining Weighed average Useful Life (in years)	14 years 6 months