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Balance Sheet Components - Schedule of Net Accounts Receivable Balance Concentrations by Major Category (Parenthetical) (Details) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) Customer | Dec. 31, 2019 USD ($) Customer
Accounts Notes And Loans Receivable [Line Items] |  |
Gross accounts receivable | $ 33,099,000 | $ 36,104,000
Customer Concentration Risk | Business To Business Receivables |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Number of customers | Customer | 1 | 1
Gross accounts receivable | $ 5,568,000 | $ 10,695,000
Credit insurance policy, deductible amount | $ 400,000 |
Credit insurance policy, retention percentage | 10.00% |
Customer Concentration Risk | Business To Business Receivables | Maximum |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Credit insurance policy, coverage limit | $ 10,000,000 | $ 20,000,000

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- Definition Credit insurance policy coverage limit. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Credit insurance policy, deductible amount. + References No definition available. + Details
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- Definition Credit insurance policy retention percentage. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Number of customers. + References No definition available. + Details
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Balance Type: | na
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4531-111522 + Details
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Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Balance Type: |
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- Details
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