v3.20.2

Condensed Consolidated Statements of Stockholders' Equity (Parenthetical)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member	us-gaap:AccountingStandardsUpdate201602Member

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- Definition

Indicates amendment to accounting standards.

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