Property, plant and equipment, net - PP&E by geographic region (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Long-lived assets
Long-lived assets	$ 50,532	$ 43,505
Lexington.
Long-lived assets
Long-lived assets	20,258	17,311
Amsterdam
Long-lived assets
Long-lived assets	30,252	26,160
Other
Long-lived assets
Long-lived assets	$ 22	$ 34

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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