Revenue recognition - Disaggregated revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue recognition
Total revenue	$ 26,646	$ 27,689	$ 79,698	$ 80,269
Product revenue
Revenue recognition
Total revenue	17,693	20,662	53,134	57,586
Service and other revenue
Revenue recognition
Total revenue	8,370	5,898	25,728	17,955
Collaboration and license revenue
Revenue recognition
Total revenue	$ 301	$ 120	$ 479	$ 486

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details