Concentrations Of Risk (Details)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2019 customer	Dec. 31, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
Number of customers derived revenue exceed the threshold of 10%	0	0	0	0
Revenue threshold	10.00%		5.00%	5.00%

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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