Revenue - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 7,755	$ 5,947	$ 21,726	$ 12,528
Product
Disaggregation of Revenue [Line Items]
Revenue	7,755	5,934	21,726	10,524
Product | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenue	$ 7,800	$ 5,900	$ 21,700	$ 10,500