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Summary of Significant Accounting Policies - Schedule of Net Accounts Receivable Balance Concentrations by Major Category (Parenthetical) (Details) | 12 Months Ended
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Dec. 31, 2020 USD ($) Customer | Dec. 31, 2019 USD ($) Customer
Accounts Notes And Loans Receivable [Line Items] |  |
Gross accounts receivable | $ 30,907,000 | $ 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 | $ 7,044,000 | $ 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 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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