Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Definite-lived intangible assets
Gross Cost	$ 67,166	$ 66,980
Accumulated Amortization	4,014	658
Intangible assets, net
Gross cost	73,795	73,609
IPR&D
Definite-lived intangible assets
Gross Cost	$ 6,629	6,629
RHOFADE product rights
Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Remaining life	9 years 4 months 24 days
Definite-lived intangible assets
Gross Cost	$ 66,415	66,229
Accumulated Amortization	$ 3,871	552
Other intangible assets
Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Remaining life	8 years 1 month 6 days
Definite-lived intangible assets
Gross Cost	$ 751	751
Accumulated Amortization	$ 143	$ 106