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The Company and Summary of Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) Customer segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Significant Accounting Policies [Line Items]
Equity investments	$ 7,575,000	$ 8,395,000
Number of reportable segments \| segment	2
Goodwill impairment charges	$ 0	0	$ 0
Accumulated goodwill impairment charges	74,200,000
Goodwill	$ 80,721,000	80,721,000
Subscription contracts, typical length	Service contracts are generally for 30 days or 12 months in length, billed either monthly or annually and generally in advance.
Shipping and handling costs	$ 145,961,000	147,854,000	138,150,000
Advertising and promotional expenses	25,200,000	20,600,000	21,300,000
Connected Home
Significant Accounting Policies [Line Items]
Goodwill	44,400,000	44,400,000	44,400,000
SMB
Significant Accounting Policies [Line Items]
Goodwill	36,300,000	36,300,000	36,300,000
Limited Partnership Fund
Significant Accounting Policies [Line Items]
Equity investments	900,000	600,000
Limited Partnership Fund \| Fair Value Measured at Net Asset Value Per Share
Significant Accounting Policies [Line Items]
Equity investments	$ 900,000	$ 600,000
Minimum
Significant Accounting Policies [Line Items]
Finite-lived intangible asset, useful life (in years)	3 years
Maximum
Significant Accounting Policies [Line Items]
Finite-lived intangible asset, useful life (in years)	10 years
Accounts Receivable \| Customer Concentration Risk
Significant Accounting Policies [Line Items]
Concentration risk, customer	No other customers accounted for 10% or greater of the Company’s total accounts receivable.
Number of customer \| Customer	0
Accounts Receivable \| Customer Concentration Risk \| Minimum
Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%
Accounts Receivable \| Best Buy Inc \| Customer Concentration Risk
Significant Accounting Policies [Line Items]
Concentration risk, percentage	26.00%	29.00%
Accounts Receivable \| Amazon \| Customer Concentration Risk
Significant Accounting Policies [Line Items]
Concentration risk, percentage	14.00%	13.00%
Accounts Receivable \| Walmart \| Customer Concentration Risk
Significant Accounting Policies [Line Items]
Concentration risk, percentage		13.00%
Shipping and Handling
Significant Accounting Policies [Line Items]
Shipping and handling costs	$ 16,400,000	$ 15,500,000	$ 8,700,000
Foreign Exchange Forward \| Maximum
Significant Accounting Policies [Line Items]
Derivative, term of contract (in months)	6 months