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Accounts Receivable
 3 Months Ended
May 31, 2019
Receivables [Abstract]  
Accounts Receivable Accounts Receivable
Accounts receivable are presented net of an allowance for doubtful accounts. Activity in the Company’s allowance for doubtful accounts is presented in the following table (in thousands):
As of
 
Balance at
beginning
of period
 
Charged to (recovery of)
expense
 
Adjustments (1)
 
Balance at
end of
period
February 28, 2019
 
$
2,167

 
3,247

 
(853
)
 
$
4,561

May 31, 2019
 
$
4,561

 
(195
)
 
86

 
$
4,452

_______________ 
(1) 
Represents foreign currency translation adjustments and amounts written-off as uncollectible accounts receivable.
Included in accounts receivable, net of allowance for doubtful accounts, are unbilled receivables of $43.3 million and $40.2 million as of May 31, 2019 and February 28, 2019, respectively.
As of May 31, 2019, no individual customer accounted for 10% or more of the Company’s total accounts receivable. As of February 28, 2019, the Company had one customer whose accounts receivable balance individually represented 10%of total accounts receivable.