Intangible assets (Tables)

9 Months Ended

Sep. 30, 2020

Intangible Assets [Abstract]

Schedule of Intangible Assets

Intangible assets include:

	Capitalized development costs		Licenses		Total
	(in thousands)
Cost:
At December 31, 2019	$	10,737	$	20,818	$	31,555
Additions	3,997		8,239		12,236
Exchange difference	—		(6)		(6)
At September 30, 2020	$	14,734	$	29,051	$	43,785
Amortization and impairment:
At December 31, 2019	1,755		13,104		14,859
Amortization	1,125		3,189		4,314
Exchange difference	—		(6)		(6)
At September 30, 2020	$	2,880	$	16,287	$	19,167
Net book value:
At January 1, 2020	$	8,982	$	7,714	$	16,696
At September 30, 2020	$	11,854	$	12,764	$	24,618