Fair Value Measurements - Market Risks and Derivative Hedge Contracts (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Net asset	$ 22,356	$ 2,477
CSI Compressco | (Level 1)
Derivatives, Fair Value [Line Items]
Net asset	9,404
CSI Compressco | (Level 2)
Derivatives, Fair Value [Line Items]
Net asset	0
CSI Compressco | (Level 3)
Derivatives, Fair Value [Line Items]
Net asset	0
Standard Lithium | (Level 1)
Derivatives, Fair Value [Line Items]
Net asset	13,008	(2,675)
Standard Lithium | (Level 2)
Derivatives, Fair Value [Line Items]
Net asset	0	0
Standard Lithium | (Level 3)
Derivatives, Fair Value [Line Items]
Net asset	0	0
Warrants liability
Derivatives, Fair Value [Line Items]
Net asset	(56)	(198)
Warrants liability | (Level 1)
Derivatives, Fair Value [Line Items]
Net asset	0	0
Warrants liability | (Level 2)
Derivatives, Fair Value [Line Items]
Net asset	0	0
Warrants liability | (Level 3)
Derivatives, Fair Value [Line Items]
Net asset	$ (56)	$ (198)