Concentration of credit risk and off-balance sheet risk (Details) - Customer Concentration Risk [Member] - Customer |
6 Months Ended | 12 Months Ended |
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Jun. 30, 2020 |
Dec. 31, 2019 |
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| Gross Sales [Member] | ||
| Concentration Risk [Line Items] | ||
| Number of customers | 2 | |
| Concentration risk percentage | 39.00% | |
| Accounts Receivable [Member] | ||
| Concentration Risk [Line Items] | ||
| Number of customers | 2 | 1 |
| Concentration risk percentage | 71.00% | 44.00% |
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- Definition Refers to the number of customers in which the Company transacts business. No definition available.
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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://www.xbrl.org/2003/role/disclosureRef
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