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Other income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Other income (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule of Equity Method Investments [Line Items]
Other Income	$ 1,680	$ 1,032	$ 9,622	$ 2,558
Employee retention income	1,300		2,600
VectorY B.V
Schedule of Equity Method Investments [Line Items]
Settlement Income	$ 0		$ 3,000
Number of shares acquired in conjunction with settlement agreement			69,899
Employee retention income		$ 0		$ 0