Other liabilities (Q3) (Details) - USD ($) $ in Thousands |
Sep. 30, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|---|
| Other liabilities [Abstract] | |||
| Reserve for potential customer dispute settlement | $ 200 | ||
| Investor prepayment | $ 500 | $ 0 |
| X | ||||||||||
- Definition Investor prepayment received from customers. No definition available.
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| X | ||||||||||
- Definition The amount of reserve for a potential customer dispute settlement. No definition available.
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| X | ||||||||||
- References No definition available.
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