Income tax (Tables)

9 Months Ended

Sep. 30, 2020

Income Taxes [Abstract]

Schedule of Major Components of Income Tax Expense

The major components of income tax expense are:

	Nine months ended September 30,
	2019		2020
	(in thousands)
Condensed Consolidated Statement of Operations
Current income tax expense	$	120	$	177
Deferred income tax expense (benefit)	(529)		398
Income tax expense (benefit) reported in the Condensed Consolidated Statement of Operations	$	(409)	$	575