Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales	$ 79,169	$ 70,736	$ 237,610	$ 210,815
Americas
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales	33,944	30,867	100,195	92,234
EMEA
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales	23,387	20,648	75,315	61,058
APAC
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales	21,838	19,221	62,100	57,523
Product sales
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales	57,838	48,082	172,748	146,866
Product sales | Product transferred to customers at a point in time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales	53,536	44,561	161,080	137,324
Product sales | Product transferred to customers over time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales	4,302	3,521	11,668	9,542
Service sales
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales	21,331	22,654	64,862	63,949
Service sales | Product transferred to customers at a point in time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales	9,332	9,623	28,931	27,268
Service sales | Product transferred to customers over time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Sales	$ 11,999	$ 13,031	$ 35,931	$ 36,681