Major suppliers (Q3) (Details) - Inventory purchases - Supplier concentration risk |
9 Months Ended | 12 Months Ended | ||
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Sep. 30, 2020 |
Sep. 30, 2019 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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Concentration Risk [Line Items] | ||||
Concentration risk percentage | 74.00% | 70.00% | ||
Three vendors | ||||
Concentration Risk [Line Items] | ||||
Concentration risk percentage | 78.00% | |||
One vendor | ||||
Concentration Risk [Line Items] | ||||
Concentration risk percentage | 85.00% |
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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. No definition available.
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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