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Revenue Recognition (Tables)
 3 Months Ended
Sep. 30, 2020
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
Our revenue is primarily generated from our interests in the Delhi field in Northeast Louisiana and our interests in the Hamilton Dome field in Wyoming. Additionally, an overriding royalty interest retained in a past divestiture of Texas properties provided de minimis revenue:
Three Months Ended
September 30,
 20202019
Revenues  
Crude oil$5,379,161 $8,845,504 
Natural gas liquids216,026 305,944 
Natural gas189 767 
Total revenues$5,595,376 $9,152,215