Concentrations of risk and geographic information - Schedule of Customer Concentration by Risk Factor (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Concentration Risk [Line Items]
Accounts receivable sold	$ 99,410	$ 120,728	$ 126,220
Factoring fees	$ 678	$ 1,509	$ 1,639
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer A [Member]
Concentration Risk [Line Items]
Concentration risk	23.00%	11.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer B [Member]
Concentration Risk [Line Items]
Concentration risk	15.00%	15.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer C [Member]
Concentration Risk [Line Items]
Concentration risk	12.00%
Customer Concentration Risk [Member] \| Sales Revenue [Member] \| Customer A [Member]
Concentration Risk [Line Items]
Concentration risk	10.00%	11.00%	13.00%

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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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.

+ References

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Amount of decrease from sale and reclassification to held-for-sale of financing receivable.

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Amount of gain (loss) on sale of accounts receivable.

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