Balance Sheet Components (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Apr. 03, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Balance Sheet Related Disclosures [Line Items]
Investments classified as available-for-sale in continuous unrealized loss position		$ 320,000	$ 0
Unrealized losses on available-for-sale securities		0	0	$ 0
Other-than-temporary impairments		0	0	0
Provisions for excess and obsolete inventory		3,657,000	3,877,000	7,872,000
Amortization expense		500,000	2,000,000.0	6,200,000
Intangible assets impairment charges		0	0	0
Equity securities without readily determinable fair value, cumulative downward adjustments for price change and impairment loss		0
Cumulative upward adjustments for price changes		300,000
Goodwill impairment charge		44,442,000	0	0
Goodwill		36,279,000	80,721,000	80,721,000
Connected Home
Balance Sheet Related Disclosures [Line Items]
Goodwill impairment charge	$ 44,400,000	44,442,000	0	0
Goodwill	0	0	44,442,000	44,442,000
Accumulated goodwill impairment charges		44,400,000
SMB
Balance Sheet Related Disclosures [Line Items]
Goodwill impairment charge	$ 0	0	0	0
Goodwill		36,279,000	$ 36,279,000	$ 36,279,000
Accumulated goodwill impairment charges		$ 0