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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Segment Information (Narrative) (Details)	3 Months Ended		9 Months Ended
Segment Information (Narrative) (Details)	Sep. 30, 2020 segment customer	Sep. 30, 2019 segment customer	Sep. 30, 2020 segment customer	Sep. 30, 2019 segment customer
United States And Canada [Member]
Segment Reporting Information [Line Items]
Number of operating segments \| segment	1	1	1	1
Revenue [Member] \| One Major Customer [Member]
Segment Reporting Information [Line Items]
Number of customers	1		1
Customer, percentage	29.00%		25.00%
Revenue [Member] \| Three Major Customers [Member]
Segment Reporting Information [Line Items]
Number of customers		3		3
Customer, percentage		43.00%		44.00%