Stockholders' Equity - Warrants, Additional Information (Details)	9 Months Ended
Sep. 30, 2018 USD ($)
Warrants to purchase common stock
Class of Warrant or Right [Line Items]
Warrants issued	$ 0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration