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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Schedule of firm transportation volumes and related demand charges

 

Period   Dekatherms per day     Demand Charges  
Apr 2019 – Mar 2020     58,871     $ 0.20 - 0.62  
Apr 2020 – May 2020     57,791     $ 0.20 - 0.56  
Jun 2020 – Oct 2020     56,641     $ 0.20 - 0.56  
Nov 2020 – Aug 2022     50,341     $ 0.20 - 0.56  
Sep 2022 – May 2027     30,990     $ 0.20 - 0.21  

Jun 2027 – May 2036

    1,000     $ 0.20