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REVENUE RECOGNITION (Tables)
12 Months Ended
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]  
Schedule of Liability for Customer Credits The following table summarizes the activity in the liability for customer credits for the years ended December 31, 2020 and 2019 (in thousands):
Customer Credits
Balance as of December 31, 2018$15,118 
Credits issued115,031 
Credits redeemed(102,682)
Breakage revenue recognized(13,699)
Foreign currency translation(4)
Balance as of December 31, 2019$13,764 
Credits issued213,826 
Credits redeemed(147,096)
Breakage revenue recognized(21,364)
Foreign currency translation1,876 
Balance as of December 31, 2020$61,006 
Schedule of Deferred Contract Acquisition Costs
Deferred contract acquisition costs are presented within the following line items of the consolidated balance sheets as of December 31, 2020 and 2019 (in thousands):
December 31,
20202019
Prepaid expenses and other current assets$1,009 $2,501 
Other non-current assets5,315 10,133 
Schedule of Expected Credit Losses on Accounts Receivable
The following table summarizes the activity in the allowance for expected credit losses on accounts receivables for the year ended December 31, 2020 (in thousands):
Allowance for Expected Credit Losses
Balance as of January 1, 2020$3,693 
Change in provision9,631 
Write-offs(3,315)
Foreign currency translation(253)
Balance as of December 31, 2020$9,756