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Summary of Significant Accounting Policies - Concentration Risk (Details) - Sales Revenue, Product Line - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2018
Customer A
Concentration Risk [Line Items]
Concentration Risk, Percentage	37.00%
Customer B
Concentration Risk [Line Items]
Concentration Risk, Percentage	27.00%
Customer C
Concentration Risk [Line Items]
Concentration Risk, Percentage	19.00%

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- Definition

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.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
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