Revenue Recognition - Revenues From Contracts With Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Revenues	$ 287,903	$ 334,411
Western Hemisphere | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	192,289	196,887
Eastern Hemisphere | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	45,180	70,370
Asia Pacific | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	50,434	67,154
Products
Disaggregation Of Revenue [Line Items]
Revenues	213,760	258,834	$ 303,279
Products | Western Hemisphere | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	146,609	151,351
Products | Eastern Hemisphere | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	34,912	56,038
Products | Asia Pacific | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	32,239	51,445
Services
Disaggregation Of Revenue [Line Items]
Revenues	74,143	75,577
Services | Western Hemisphere | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	45,680	45,536
Services | Eastern Hemisphere | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	10,268	14,332
Services | Asia Pacific | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	$ 18,195	$ 15,709