Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets

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Intangible Assets
 3 Months Ended
Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible Assets
Intangible assets, net consisted of the following as of March 31, 2024 and December 31, 2023 (in thousands):

  March 31,
2024		 December 31,
2023
Intangible assets, at cost:    
Saltwater disposal easement $ 17,557  $ 17,557 
Groundwater rights acquired 3,846  3,846 
Total intangible assets, at cost (1)
21,403  21,403 
Less: accumulated amortization (662) (378)
Intangible assets, net $ 20,741  $ 21,025 
(1)The remaining weighted average amortization period for total intangible assets was 18.5 years as of March 31, 2024.

There were no intangible asset acquisitions for the three months ended March 31, 2024 or 2023.

Amortization of intangible assets was $0.3 million for the three months ended March 31, 2024. There was no amortization of intangible assets for the three months ended March 31, 2023. The estimated future annual amortization expense of intangible assets is $0.9 million for the remainder of 2024, $1.1 million for each year of 2025 through 2029, and $14.3 million thereafter.