Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Goodwill	$ 23,585	$ 22,915	$ 24,089
Optimization Software & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Goodwill	20,642	19,972	21,146
E&P Technology & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Goodwill	$ 2,943	$ 2,943	$ 2,943
Goodwill
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Operational forecast period used in fair value inputs	3 years