Income taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022
Income Tax Examination [Line Items]
Income Tax Expense (Benefit)	$ 25	$ 59
Amount of income tax benefits for the net operating losses incurred or for the research and development tax credits		0
Maximum
Income Tax Examination [Line Items]
Income Tax Expense (Benefit)		$ 100