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ACCOUNTS RECEIVABLE, NET OF ALLOWANCE FOR CREDIT LOSSES
 12 Months Ended
Dec. 31, 2020
Credit Loss [Abstract]  
ACCOUNTS RECEIVABLE, NET OF ALLOWANCE FOR CREDIT LOSSES ACCOUNTS RECEIVABLE, NET OF ALLOWANCE FOR CREDIT LOSSES
A summary of the changes to allowance for credit losses follows:
Fiscal Year Ended
December 31,
202020192018
Balance at beginning of period$1,468$931 $809 
Cumulative effect of new accounting principle189— — 
Additions - charged to expense1,9711,360 1,620 
Deductions - bad debts written off, net of recoveries(1,295)(823)(1,498)
Balance at end of period$2,333$1,468 $931