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

Segments - Narrative (Details) - segment	3 Months Ended		9 Months Ended
Segments - Narrative (Details) - segment	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Number of reportable segments			1
Sales Revenue, Net \| Geographic Concentration Risk \| United States
Segment Reporting Information [Line Items]
Concentration risk, percentage	89.90%	90.10%	90.50%	90.40%
Sales Revenue, Net \| Geographic Concentration Risk \| Canada
Segment Reporting Information [Line Items]
Concentration risk, percentage	10.10%	9.90%	9.50%	9.60%