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

Geographic Information (Narrative) (Details) - customer	3 Months Ended		6 Months Ended		12 Months Ended
Geographic Information (Narrative) (Details) - customer	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Net Revenue [Member]
Revenue, Major Customer [Line Items]
Number of customers	1	1	1	1
Percentage of risk	61.00%	61.00%	62.00%	60.00%
Accounts Receivable [Member]
Revenue, Major Customer [Line Items]
Number of customers			2		2
Percentage of risk			63.00%		51.00%
Contract Assets [Member]
Revenue, Major Customer [Line Items]
Number of customers			1		1
Percentage of risk			84.00%		86.00%