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Accounts Receivable
 12 Months Ended
Dec. 31, 2020
Receivables [Abstract]  
Accounts Receivable ACCOUNTS RECEIVABLE
Accounts receivable, net of allowances, consisted of the following:
 As of December 31,
(in thousands)20202019
Accounts receivable, net:
Accounts receivable$68,295 $91,513 
Less: allowance for doubtful accounts and sales returns(2,068)(3,013)
Total$66,227 $88,500 
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,
2020$3,013 $1,367 $299 $(2,611)$2,068 
2019$3,497 $1,896 $(396)$(1,984)$3,013 
2018$4,631 $1,949 $572 $(3,655)$3,497