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Summary of Significant Accounting Policies - Schedule of Net Accounts Receivable Balance by Aging Category by Invoice Due Date (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Accounts Notes And Loans Receivable [Line Items] |  |
Accounts receivable, net | $ 34,325 | $ 37,041
Net accounts receivable, percentage | 100.00% | 100.00%
Held And Unbilled |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Accounts receivable, net | $ 294 | $ 80
Net accounts receivable, percentage | 0.80% | 0.20%
Aged 0-90 Days |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Accounts receivable, net | $ 33,427 | $ 36,245
Net accounts receivable, percentage | 97.40% | 97.90%
Aged 91-180 Days |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Accounts receivable, net | $ 343 | $ 425
Net accounts receivable, percentage | 1.00% | 1.10%
Aged 181-365 Days |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Accounts receivable, net | $ 261 | $ 234
Net accounts receivable, percentage | 0.80% | 0.60%
Aged Over 365 Days |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Accounts receivable, net |  | $ 57
Net accounts receivable, percentage | 0.00% | 0.20%

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