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Investments (Tables)
 3 Months Ended
Mar. 31, 2024
Investments in and Advances to Affiliates [Abstract]  
Summary of Investments
Our investments as of March 31, 2024 and December 31, 2023 consist of the following:
March 31, 2024December 31, 2023
(in thousands)
Investment in CSI Compressco
$12,204 $8,538 
Investment in CarbonFree6,888 6,850 
Investment in Standard Lithium944 1,616 
Other investments
350 350 
Total Investments$20,386 $17,354