Basis of Presentation (Changes in Allowance for Sales Returns and Doubtful Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
Allowance for credit losses [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	$ 9,016	$ 4,011	[1]
Provision/adjustment	4,483	6,787
Write-off	4,565	2,363
Recovery	441	581
Balance at end of year	9,375	9,016		$ 4,011	[1]
SEC Schedule, 12-09, Balance at beginning of year		1,883		1,345
SEC Schedule, 12-09, Provision/adjustment				2,476
SEC Schedule, 12-09, Deduction				(2,617)
SEC Schedule, 12-09, Recovery				679
SEC Schedule, 12-09, Balance at end of year				1,883
Allowance for sales returns [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	1,276	1,518	[2]
Provision/adjustment	6,967	6,443
Write-off	6,463	6,685
Balance at end of year	$ 1,780	1,276		1,518	[2]
SEC Schedule, 12-09, Balance at beginning of year		$ 3,646		3,377
SEC Schedule, 12-09, Provision/adjustment				6,232
SEC Schedule, 12-09, Deduction				(5,963)
SEC Schedule, 12-09, Balance at end of year				$ 3,646

[1] Upon adoption of ASU 2016-13 at January 1, 2020, we reclassified certain balances previously disclosed within the allowance for sales returns to the allowance for credit losses, as these amounts reflect the credit risk associated with our accounts receivable. The amount reclassified was $2.1 million.

[2] As discussed above, we reclassified certain balances previously disclosed within the allowance for sales returns to the allowance for credit losses upon adoption of ASU 2016-13 at January 1, 2020. The amount reclassified was $2.1 million.