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Revenue - Additional Information (Details) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) PerformanceObligation | Dec. 31, 2019 USD ($) | Jan. 01, 2019 USD ($)
Disaggregation Of Revenue [Line Items] |  |  |  |
Accumulated deficit | $ (257.6) | $ (257.6) | $ (178.4) |
Revenue, practical expedient description |  | The Company has elected to apply a practical expedient for contracts that have a term of one year or less and has not disclosed either the remaining performance obligation as of the end of the reporting period or when the Company expects to recognize the revenue. |  |
Revenue, practical expedient |  | true |  |
Deferred revenue | 8.2 | $ 8.2 | 5.6 |
Contractual term |  | 36 months |  |
Capitalized acquisition costs, net (Note 8) | 29.3 | $ 29.3 | $ 26.4 |
Cumulative Impact of Adopting ASC 606 |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Deferred revenue | (0.5) | $ (0.5) |  |
Cumulative Impact of Adopting ASC 606 | ASC 606 |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Accumulated deficit |  |  |  | $ 7.0
Number of revenue performance obligations | PerformanceObligation |  | 3 |  |
Revenue performance obligation description |  | The Company has three separate performance obligations under its recurring SaaS fees for point-of-sale systems provided to merchants: (1) point-of-sale software, (2) lease of hardware and (3) other support services. |  |
Cumulative Impact of Adopting ASC 606 | ASC 606 | Other Operating (Income) Expense, Net |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Operating lease cost | $ 12.4 | $ 12.4 |  |

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