Intangible Assets (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2017 item
Intangible Assets
Less accumulated Amortization	$ (6,816)		$ (6,816)		$ (1,283)
Net book value of intangible assets	37,162		37,162		36,350
Additional disclosures
Amortization expense	4,100	$ 300	5,500	$ 900
Trokendi XR patent litigation
Additional disclosures
Number of settlements | item						2
Capitalized patent defense costs
Intangible Assets
Gross Carrying Amount	$ 43,978		$ 43,978		$ 37,633
Capitalized patent defense costs | Minimum
Intangible Assets
Weighted-Average Life			5 years 10 months 24 days		5 years 10 months 24 days
Capitalized patent defense costs | Maximum
Intangible Assets
Weighted-Average Life			10 years		10 years