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Accounts Receivable
 12 Months Ended
Dec. 31, 2019
Receivables [Abstract]  
Accounts Receivable
ACCOUNTS RECEIVABLE
Accounts receivable, net of allowances, consisted of the following (in thousands):
 
December 31,
 
2019
 
2018
Accounts receivable, net:
 
 
 
   Accounts receivable
$
91,513

 
$
85,292

   Less: allowance for doubtful accounts and sales returns
(3,013
)
 
(3,497
)
      Total
$
88,500

 
$
81,795


Trade accounts receivable are recorded at invoiced amounts and do not bear interest. The Company generally does not require collateral and performs ongoing credit evaluations of its customers and provides for expected losses. The Company maintains an allowance for doubtful accounts based upon the expected collectability of its accounts receivable. The expectation of collectability is based on the Company’s review of credit profiles of customers, contractual terms and conditions, current economic trends and historical payment experience. The Company offers return rights which are specifically identified and accrued for as sales returns at the end of the period.
The following table is a summary of activities in allowances for doubtful accounts and sales returns (in thousands):
 
Balance at
Beginning of
Period
 
Charges to
Revenue
 
Charges
(Credits) to
Expense
 
Additions to
(Deductions
from) Reserves
 
Balance at End
of Period
Year ended December 31,
 
 
 
 
 
 
 
 
 
2019
$
3,497

 
$
1,896

 
$
(396
)
 
$
(1,984
)
 
$
3,013

2018
$
4,631

 
$
1,949

 
$
572

 
$
(3,655
)
 
$
3,497

2017
$
4,831

 
$
4,030

 
$
881

 
$
(5,111
)
 
$
4,631