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Revenue Recognition Revenue Recognition (Tables)
 12 Months Ended
Dec. 31, 2018
Revenue Recognition [Abstract]  
Disaggregation of Revenue [Table Text Block]
The following table provides information regarding our oil and gas sales, by product, reported on the Statements of Operations for the years ended December 31, 2018 and 2017 (in thousands):

 
 
Year Ended December 31, 2018
 
Year Ended December 31, 2017
Oil, natural gas and NGLs sales:
 
 
 
 
Oil
 
$
45,375

 
$
34,903

Natural gas
 
183,272

 
138,404

NGLs
 
28,639

 
22,602

Total
 
$
257,286

 
$
195,910