XML 36 R11.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Accounts Receivable
 12 Months Ended
Dec. 31, 2019
Receivables [Abstract]  
Accounts Receivable Accounts Receivable
A summary of accounts receivable is as follows (in thousands):
 December 31,
 20192018
Oil, natural gas and NGL sales$22,281  $31,780  
Joint interest billing5,165  13,083  
Other2,315  1,935  
Total accounts receivable29,761  46,798  
Less: allowance for doubtful accounts(1,117) (1,295) 
Total accounts receivable, net$28,644  $45,503  

The following table presents the balance and activity in the allowance for doubtful accounts for the years ended December 31, 2019, 2018 and 2017 (in thousands):
Year Ended December 31,
 201920182017
Beginning balance$1,295  $1,274  $880  
Additions charged to costs and expenses6  758  397  
Deductions(1)(184) (737) (3) 
Ending balance$1,117  $1,295  $1,274  
____________________
(1)Deductions represent the write-off of receivables and collections of amounts for which an allowance had previously been established.