Goodwill and Intangible Asset (Details) - USD ($) $ in Thousands	1 Months Ended
	Oct. 31, 2013	Jun. 30, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill	$ 21,200	$ 21,208	$ 21,208
Indefinite-lived intangible assets (IPR&D)		56,100	$ 56,100
SCH | Evolus, Inc.
Business Acquisition [Line Items]
Goodwill acquired	56,300
Assets acquired, indefinite-lived intangible assets (IPR&D)	56,100
Liabilities assumed in acquisition, deferred tax liabilities	$ 20,900
Contingent consideration upon successful completion of certain technical and sales milestones		$ 13,500