The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585

Name:	us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The Company and Basis of Presentation (Details) - USD ($) $ in Millions	2 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Redeemable Convertible Preferred Stock
Sale of Stock
Net proceeds		$ 16.8
Convertible notes
Sale of Stock
Net proceeds		$ 0.5
Series B Redeemable Convertible Preferred Stock
Sale of Stock
Net proceeds	$ 24.2