REVENUE AND CONTRACT LIABILITY (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Schedule of deferred revenues

The following table provides information about unearned revenue from contracts with customers, including significant changes in unearned revenue balances during the period (in thousands):

	Amount
Unearned revenue at December 31, 2019	$	41,116
Increase due to deferral of revenue at period end	66,070
Decrease due to beginning contract liabilities recognized as revenue	(35,021)
Unearned revenue at December 31, 2020	72,165
Increase due to deferral of revenue at period end	51,384
Decrease due to beginning contract liabilities recognized as revenue	(64,162)
Unearned revenue at December 31, 2021	$	59,387

Schedule of sales returns allowance

The following table provides additions to and deduction from the sales returns allowance (in thousands):

	Amount
Allowance for returns at December 31, 2018	$	15,261
Additions to the allowance	117,039
Deductions from the allowance	(121,194)
Allowance for returns at December 31, 2019	11,106
Additions to the allowance	204,810
Deductions from the allowance	(196,726)
Allowance for returns at December 31, 2020	19,190
Additions to the allowance	237,622
Deductions from the allowance	(242,889)
Allowance for returns at December 31, 2021	$	13,923