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Accounts Receivable
6 Months Ended
Jun. 30, 2018
Accounts Receivable, Net [Abstract]  
Accounts Receivable
Accounts Receivable
Accounts receivable consist of the following:
 
 
June 30,
2018
 
December 31,
2017
Trade customers
 
$
1,198

 
$
974

Affiliates
 
12

 
9

Allowance for doubtful accounts
 
(24
)
 
(22
)
 
 
1,186

 
961

Federal and state taxes
 
48

 
7

Other
 
27

 
33

Accounts receivable, net
 
$
1,261

 
$
1,001