Segment reporting and concentrations - Additional information (Details) $ in Thousands	12 Months Ended
Dec. 31, 2021 USD ($) segment client	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments \| segment	3
Classification of segment assets \| $	$ 59,217	$ 57,254
Foreign Customer [Member] \| Sales Revenue, Net [Member] \| Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	45.00%	54.00%
Foreign Customer [Member] \| Accounts receivable \| Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	37.00%	55.00%
One Client [Member] \| Sales Revenue, Net [Member] \| Customer Concentration Risk
Segment Reporting Information [Line Items]
Number of clients	1
Concentration Risk, Percentage	11.00%	14.00%
One Client [Member] \| Accounts receivable \| Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	19.00%
Three Clients [Member] \| Accounts receivable \| Customer Concentration Risk
Segment Reporting Information [Line Items]
Number of clients	3
Concentration Risk, Percentage		36.00%
Client [Member] \| Sales Revenue, Net [Member] \| Customer Concentration Risk
Segment Reporting Information [Line Items]
Number of clients	0
Concentration Risk, Percentage	10.00%
Client [Member] \| Accounts receivable \| Customer Concentration Risk
Segment Reporting Information [Line Items]
Number of clients	0
Concentration Risk, Percentage	10.00%

Represents number of clients.

No definition available.

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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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.

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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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.

+ References

No definition available.

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