Basis of Presentation - Reverse Stock Split (Details)	Oct. 21, 2019	Aug. 29, 2019
Basis of Presentation
Reverse stock split, approved, high end of range		0.1
Reverse stock split, approved, low end of range		0.2
Reverse stock split	0.1

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187143-122770

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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration