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The Company and Summary of Significant Accounting Policies (Narrative) (Details) | 12 Months Ended
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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 |  |

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