Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Revision of Prior Period Change in Accounting Principle Adjustment	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit) Revision of Prior Period Change in Accounting Principle Adjustment	Non-Controlling Interest [Member]
Beginning balance at Dec. 31, 2017	$ 730,485		$ 31	$ 603,137	$ (851)	$ 128,168
Beginning balance (Adoption of ASU 2014-09 (ASC 606 Rev Rec), ASU 2016-16, and ASU 2018-02) at Dec. 31, 2017		$ 8,593					$ 8,593
Beginning balance (in shares) at Dec. 31, 2017			31,320
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in unrealized gains and losses on available-for-sale investments, net of tax	78				78
Change in unrealized gains and losses on derivatives, net of tax	758				758
Net income (loss)	(9,162)					(9,162)
Net loss attributable to non-controlling interest	(9,167)							$ (9,167)
Stock-based compensation	31,966			31,966
Stock-based compensation for Arlo's shares	942							942
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	170,246			146,088				24,158
Repurchase of common stock	$ (30,000)					(30,000)
Repurchase of common stock (in shares)	(500)		(473)
Restricted stock unit withholdings	$ (8,065)					(8,065)
Restricted stock unit withholdings (in shares)	(138)		(138)
Issuance of common stock under stock-based compensation plans	$ 12,395		$ 1	12,394
Issuance of common stock under stock-based compensation plans (in shares)			853
Distribution of Arlo	(271,517)					(255,584)		$ (15,933)
Ending balance at Dec. 31, 2018	627,552		$ 32	793,585	(15)	(166,050)
Ending balance (in shares) at Dec. 31, 2018			31,562
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in unrealized gains and losses on available-for-sale investments, net of tax	12				12
Change in unrealized gains and losses on derivatives, net of tax	24				24
Net income (loss)	25,791					25,791
Net loss attributable to non-controlling interest	0
Stock-based compensation	29,137			29,137
Repurchase of common stock	$ (75,946)		$ (3)			(75,943)
Repurchase of common stock (in shares)	(2,400)		(2,406)
Restricted stock unit withholdings	$ (6,521)					(6,521)
Restricted stock unit withholdings (in shares)	(198)		(198)
Issuance of common stock under stock-based compensation plans	$ 8,644		$ 1	8,643
Issuance of common stock under stock-based compensation plans (in shares)			967
Ending balance at Dec. 31, 2019	608,693		$ 30	831,365	21	(222,723)
Ending balance (in shares) at Dec. 31, 2019			29,925
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in unrealized gains and losses on derivatives, net of tax	(56)				(56)
Net income (loss)	58,293					58,293
Net loss attributable to non-controlling interest	0
Stock-based compensation	30,505			30,505
Repurchase of common stock	$ (23,801)		$ (1)			(23,800)
Repurchase of common stock (in shares)	(900)		(942)
Restricted stock unit withholdings	$ (5,090)					(5,090)
Restricted stock unit withholdings (in shares)	(198)		(198)
Issuance of common stock under stock-based compensation plans	$ 20,840		$ 1	20,839
Issuance of common stock under stock-based compensation plans (in shares)			1,614
Ending balance at Dec. 31, 2020	$ 689,384		$ 30	$ 882,709	$ (35)	$ (193,320)
Ending balance (in shares) at Dec. 31, 2020			30,399