Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	[1]	$ 1,079	$ 1,254	$ 1,050
Other	[1]	2	0	0
Additions	[1]	0	21	50
Deductions	[1]	0	(196)	154
Balance at end of year	[1]	1,081	1,079	1,254
Allowance for sales returns
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	[1]	0	0	14,321
Other	[1]	0	0	(14,321)	[2]
Additions	[1]	0	0	0
Deductions	[1]	0	0	0
Balance at end of year	[1]	0	0	0
Allowance for price protection
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	[1]	0	0	3,245
Other	[1]	0	0	(3,245)	[2]
Additions	[1]	0	0	0
Deductions	[1]	0	0	0
Balance at end of year	[1]	$ 0	$ 0	$ 0

[1] Upon Arlo's Distribution on December 31, 2018, Arlo’s historical financial results for periods prior to its Distribution were reflected in our consolidated financial statements as discontinued operations and these schedules represent the results from continuing operations. Refer to Note 3. Discontinued Operations, for additional information on Arlo's Distribution.

[2] Upon adoption of ASC 606, allowances for sales returns and price protection were reclassified to current liabilities as these reserve balances are considered refund liabilities.