Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Significant Accounting Policies (Tables)

v3.19.2
Basis of Presentation and Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2019
Accounting Policies [Abstract]  
Schedule of allowance for doubtful accounts receivable
Following is a roll forward of the allowance for doubtful accounts for the year ended December 31, 2018 and the six months ended June 30, 2019 (in thousands):

Balance, January 1, 2018
 
$
21,737

Additions (reductions) charged to bad debt expense
 
(14,589
)
Deductions for uncollectible receivables written off
 
(1,950
)
Balance, December 31, 2018
 
5,198

Additions charged to bad debt expense
 
266

Deductions for uncollectible receivables written off
 
(155
)
Balance, June 30, 2019
 
$
5,309

Schedules of concentration of risk
Following is a summary of our significant customers based on percentages of total accounts receivable balances at June 30, 2019 and December 31, 2018 and percentages of total revenues derived for the three and six months ended June 30, 2019 and 2018:
 
REVENUES
 
ACCOUNTS RECEIVABLE
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
At June 30,
At December 31,
 
2019
2018
 
2019
2018
 
2019
2018
Customer A(a)
6
%
65
%
 
22
%
65
%
 
61
%
65
%
Customer B(b)
26
%
9
%
 
23
%
11
%
 
9
%
3
%
Customer C(c)
5
%
—
%
 
10
%
—
%
 
1
%
2
%
a.
Customer A is a third-party customer. Revenues and the related accounts receivable balances earned from Customer A were derived from the Company's infrastructure services segment. Accounts receivable for Customer A also includes receivables due for interest charged on delinquent accounts receivable.
b.
Customer B is a related party customer. Revenues and the related accounts receivable balances earned from Customer B were derived from the Company's pressure pumping services segment, natural sand proppant services segment and other businesses.
c.
Customer C is a third-party customer. Revenues and the related accounts receivable balances earned from Customer C were derived from the Company's pressure pumping services segment and equipment rental business.