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Other Financial Statement Information - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Concentration Risk [Line Items] |  |  |  |  |
Transaction price allocated to remaining performance obligations | $ 4,600 |  | $ 4,600 |  |
Contract liability | 4,600 |  | 4,600 |  | $ 4,100
Deferred revenue, current | 3,432 |  | 3,432 |  | $ 3,297
Contract with customer, liability, revenue recognized | $ 1,100 |  | $ 2,100 |  |
Revenue | Geographic Concentration Risk | UNITED STATES |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Percentage of revenue | 45.00% | 53.00% | 50.00% | 57.00% |

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