Segment Information (Schedule of Reportable Segments and Reconciliation of Segment Contribution Income (Loss) to Income (Loss) Before Income Taxes) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 01, 2023	Oct. 02, 2022	Oct. 01, 2023	Oct. 02, 2022
Segment Reporting Information [Line Items]
Total net revenue	[1]	$ 197,845	$ 249,587	$ 552,166	$ 683,369
Total segment contribution income		26,798	23,171	52,940	50,811
Corporate and unallocated costs		(21,546)	(21,392)	(65,495)	(62,532)
Amortization of intangibles	[2]	0	(129)	(257)	(386)
Stock-based compensation expense		(4,285)	(3,440)	(13,637)	(13,266)
Goodwill impairment		0	0	0	(44,442)
Intangibles impairment		(1,071)	0	(1,071)	0
Restructuring and other charges		(366)	(361)	(2,703)	(911)
Litigation reserves, net		(178)	0	(178)	(20)
Other income (expenses), net	[3]	2,280	638	11,685	(1,164)
Income (loss) before income taxes		1,632	(1,513)	(18,716)	(71,910)
Connected Home
Segment Reporting Information [Line Items]
Total net revenue	[1]	127,335	150,581	328,487	409,787
Total segment contribution income		$ 11,885	$ (512)	$ 9,558	$ (3,033)
Segment contribution margin		9.30%	(0.30%)	2.90%	(0.70%)
SMB
Segment Reporting Information [Line Items]
Total net revenue	[1]	$ 70,510	$ 99,006	$ 223,679	$ 273,582
Total segment contribution income		$ 14,913	$ 23,683	$ 43,382	$ 53,844
Segment contribution margin		21.20%	23.90%	19.40%	19.70%

[1] No individual foreign country represented more than 10% of the Company's total net revenue in the periods presented.

[2] Amounts exclude amortization expense related to patents within purchased intangibles in cost of revenue.

[3] Amounts included gain/(loss), net from litigation settlements of $6.0 million for the nine months ended October 1, 2023, and gain/(loss), net from derivatives not designated as hedging instruments of $1.3 million and $2.2 million, for the three and nine months ended October 1, 2023, respectively, and $3.4 million and $6.9 million for the three and nine months ended October 2, 2022, respectively.