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Commitments and Contingencies (Details) - USD ($) | Feb. 28, 2017 | Jun. 30, 2020 | Jan. 02, 2020 | Dec. 31, 2019
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Business Acquisition [Line Items] |  |  |  |
Loss contingency accrual |  | $ 0 |  | $ 0
Walmart Program Agreement |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Capital contributions, authorized amount |  |  | $ 35,000,000.0 |
UniRush, LLC |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Contingent consideration, earn-out payable | $ 20,000,000 |  |  |
Contingent consideration, earn-out period | 5 years |  |  |

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