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Investments in and Advances to Affiliates (Tables)
12 Months Ended
Dec. 31, 2022
Investments in and Advances to Affiliates [Abstract]  
Investments in and Advances to Affiliates
Our investments as of December 31, 2022 and 2021, consist of the following:
 December 31,
 20222021
 (In Thousands)
Investment in CSI Compressco$6,967 $6,233 
Investment in CarbonFree6,139 5,000 
Investment in Standard Lithium1,180 — 
Total investments$14,286 $11,233