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Risks and Uncertainties - Additional Information (Details) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Jan. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) Customer | Dec. 31, 2019 USD ($)
Concentration Risk [Line Items] |  |  |
Revenue |  | $ 26,722 | $ 9,083
Unbilled receivables current |  | 4,263 |
Note Receivable | Customer |  |  |
Concentration Risk [Line Items] |  |  |
Concentration of risk, notes receivable |  | $ 13,200 |
Note receivable from number of customer | Customer |  | 1 |
Revenue |  | $ 11,200 |
Unbilled receivables current |  | $ 4,300 |
Revenue | Customer |  |  |
Concentration Risk [Line Items] |  |  |
Note receivable from number of customer | Customer |  | 1 |
Revenue |  | $ 8,800 |
Subsequent Event | Note Receivable | Customer |  |  |
Concentration Risk [Line Items] |  |  |
Proceeds from notes receivable | $ 6,000 |  |

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