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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
CONDENSED CONSOLIDATED BALANCE SHEETS    
Oil and natural gas properties excluded from depletion $ 299,613,448 $ 280,304,353
Temporary equity, issued (in units) 110,000 110,000
Temporary equity, outstanding (in units) 110,000 110,000
Common units, issued (in units) 23,520,219 18,056,487
Common units, outstanding (in units) 23,520,219 18,056,487
Class B units, issued (in units) 23,388,258 19,453,258
Class B units, outstanding (in units) 23,388,258 19,453,258