Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Significant Accounting Policies (Tables)

v3.21.1
Basis of Presentation and Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2021
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, 2020 and the three months ended March 31, 2021 (in thousands):

Balance, January 1, 2020 $ 5,154 
Additions charged to bad debt expense 22,705 
Additions charged to other selling, general and administrative expense 3,950 
Additions charged to other, net - related parties 1,427 
Recoveries of receivables previously charged to bad debt expense (747)
Deductions for uncollectible receivables written off (2,350)
Balance, December 31, 2020 30,139 
Additions charged to bad debt expense 10,263 
Additions charged to revenue 27,071 
Additions charged to other selling, general and administrative expense 186 
Additions charged to other, net - related parties 515 
Recoveries of receivables previously charged to bad debt expense (138)
Deductions for uncollectible receivables written off (90)
Balance, March 31, 2021 $ 67,946 
Schedules of Concentration of Risk Following is a summary of our significant customers based on percentages of total accounts receivable balances at March 31, 2021 and December 31, 2020 and percentages of total revenues derived for the three months ended March 31, 2021 and 2020:
REVENUES ACCOUNTS RECEIVABLE
Three Months Ended March 31, At March 31, At December 31,
2021 2020 2021 2020
Customer A(a)
—  % —  % 77  % 71  %
Customer B(b)
25  % 20  % 8  % 7  %
Customer C(c)
10  % 14  % 1  % 1  %
Customer D(d)
11  % 10  % 2  % 1  %
a.Customer A is a third-party customer. The accounts receivable balances 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 well completion services segment, natural sand proppant services segment and other businesses. Accounts receivable for Customer B also includes receivables due for interest charged on delinquent accounts receivable.
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 well completion services segment and equipment rental business.
d.Customer D is a third-party customer. Revenues and the related accounts receivable balances earned from Customer D were derived from the Company's infrastructure services segment.