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Equity Method Investment (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Jan. 02, 2020
Schedule of Equity Method Investments [Line Items] |  |  |  |
Losses in equity method investment | $ 2,900,000 | $ 2,716,000 | $ 0 |
Walmart Program Agreement |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Capital contributions, authorized amount |  |  |  | $ 35,000,000.0
Walmart Program Agreement | TailFin Labs |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity interest |  |  |  | 20.00%

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