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The Company and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items] |  |  |
Maximum specific allowance as percentage of invoice value for problematic customer balances |  | 100.00% |
Allowance for doubtful accounts receivable |  | $ 41,000 | $ 0
Inventory reserves |  | $ 100 | 100
Impairment of goodwill | $ 400 |  | 420
Goodwill balance | $ 0 |  |
Payment terms |  | The Company sells its products both directly to customers and through distributors generally under agreements with payment terms typically 60 days or less |
Deferred revenue, revenue recognized |  | $ 200 | $ 300
Period payments due from customers |  | 60 days |
Revenue, practical expedient, financing component |  | true |
Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment |  | 3 years |
Estimated useful lives of long-lived assets |  | 3 years |
Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment |  | 5 years |
Estimated useful lives of long-lived assets |  | 7 years |

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- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 + Details
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