Revenue - Disaggregated by Category (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 438,589	$ 348,566	$ 628,414
Product revenue
Disaggregation of Revenue [Line Items]
Total revenues	280,907	206,801	357,087
Rental revenue
Disaggregation of Revenue [Line Items]
Total revenues	61,629	66,169	141,816
Field service and other revenue
Disaggregation of Revenue [Line Items]
Total revenues	$ 96,053	$ 75,596	$ 129,511