Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Tables)

v3.19.3.a.u2
Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]  
Schedule of Allowance for Doubtful Accounts Receivable
Following is a roll forward of the allowance for doubtful accounts for the years ended December 31, 2019, 2018 and 2017 (in thousands):
Balance, December 31, 2016
 
$
5,377

Additions charged to expense
 
16,206

Additions - other
 
179

Deductions for uncollectible receivables written off
 
(25
)
Balance, December 31, 2017
 
21,737

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

Additions charged to expense
 
1,434

Deductions for uncollectible receivables written off
 
(1,478
)
Balance, December 31, 2019
 
$
5,154

Schedule of Asset Retirement Obligations
Following is a roll forward of the Company's asset retirement obligations for the years ended December 31, 2019 and 2018 (in thousands):
 
 
December 31,
 
 
2019
 
2018
Balance as of beginning of period
 
$
3,164

 
$
2,123

Additions
 
952

 
989

Accretion expense
 
120

 
60

Foreign currency translation adjustment
 
5

 
(8
)
Asset retirement obligation as of end of period
 
$
4,241

 
$
3,164

Schedules of Significant Customers
Following is a summary of our significant customers based on accounts receivable balances at December 31, 2019 and 2018 and revenues derived for the years ended December 31, 2019, 2018 and 2017:
 
REVENUES
 
ACCOUNTS RECEIVABLE
 
Years Ended December 31,
 
At December 31,
 
2019
2018
2017
 
2019
2018
Customer A(a)
15
%
60
%
29
%
 
73
%
65
%
Customer B(b)
20
%
8
%
30
%
 
2
%
3
%
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.