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ACCOUNTS RECEIVABLE, NET
 12 Months Ended
Dec. 31, 2019
Receivables [Abstract]  
ACCOUNTS RECEIVABLE, NET
ACCOUNTS RECEIVABLE, NET

Accounts receivable, net, consisted of the following (in thousands):
 
December 31,
 
2019
 
2018
Accounts receivable
$
193,619

 
$
188,522

Allowance for doubtful accounts
(913
)
 
(669
)
  Accounts receivable, net
$
192,706

 
$
187,853




The Company's allowance for doubtful accounts activity was as follows (in thousands):
Year ended December 31,
Balance at
beginning
of year
 
Charges
to expense
 
Charges (credits) to other accounts (deferred revenue)
 
Write-offs
 
Balance at
end of
year
2019
$
669

 
$
738

 
$
68

 
$
(562
)
 
$
913

2018
$
73

 
$
351

 
$
620

 
$
(375
)
 
$
669

2017
$
10

 
$
154

 
$
(56
)
 
$
(35
)
 
$
73