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Revenue Recognition (Tables)
6 Months Ended
Dec. 31, 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
December 31,
Six Months Ended
December 31,
 2020201920202019
Revenues  
Crude oil$5,462,783 $8,974,237 $10,841,944 $17,819,741 
Natural gas liquids305,200 406,634 521,226 712,578 
Natural gas169 744 358 1,511 
Total revenues$5,768,152 $9,381,615 $11,363,528 $18,533,830